Merge all of my changes from merge-back-to-feature-vfd_swmr-attempt-1,

including the merge of `hdffv/hdf5/develop`, back to the branch that Vailin and
I share.

Now I need to put this branch on a fork with a less confusing name than
vchoi_fork!

17 files changed, 313 insertions, 62 deletions

diff --git a/c++/src/C2Cppfunction_map.htm b/c++/src/C2Cppfunction_map.htm
index b53ea15..2d779a3 100644
--- a/c++/src/C2Cppfunction_map.htm
+++ b/c++/src/C2Cppfunction_map.htm
@@ -7666,6 +7666,42 @@ normal'><span style='font-size:14.0pt;mso-bidi-font-size:11.0pt;line-height:
   normal'><o:p>&nbsp;</o:p></p>
   </td>
  </tr>
+ <tr style='mso-yfti-irow:180'>
+  <td width=263 style='width:197.2pt;border:solid windowtext 1.0pt;border-top:
+  none;mso-border-top-alt:solid windowtext .5pt;mso-border-alt:solid windowtext .5pt;
+  padding:0in 5.4pt 0in 5.4pt'>
+  <p class=MsoNormal style='margin-bottom:0in;margin-bottom:.0001pt;line-height:
+  normal'>H5Fget_fileno</p>
+  </td>
+  <td width=474 valign=top style='width:355.2pt;border-top:none;border-left:
+  none;border-bottom:solid windowtext 1.0pt;border-right:solid windowtext 1.0pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  mso-border-alt:solid windowtext .5pt;padding:0in 5.4pt 0in 5.4pt'>
+  <p class=MsoNormal style='margin-bottom:0in;margin-bottom:.0001pt;line-height:
+  normal'>unsigned long H5File::getFileNum()</p>
+  </td>
+  <td width=35 valign=top style='width:26.05pt;border-top:none;border-left:
+  none;border-bottom:solid windowtext 1.0pt;border-right:solid windowtext 1.0pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  mso-border-alt:solid windowtext .5pt;padding:0in 5.4pt 0in 5.4pt'>
+  <p class=MsoNormal align=center style='margin-bottom:0in;margin-bottom:.0001pt;
+  text-align:center;line-height:normal'><o:p>&nbsp;</o:p></p>
+  </td>
+  <td width=42 valign=top style='width:31.45pt;border-top:none;border-left:
+  none;border-bottom:solid windowtext 1.0pt;border-right:solid windowtext 1.0pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  mso-border-alt:solid windowtext .5pt;padding:0in 5.4pt 0in 5.4pt'>
+  <p class=MsoNormal align=center style='margin-bottom:0in;margin-bottom:.0001pt;
+  text-align:center;line-height:normal'><o:p>&nbsp;</o:p></p>
+  </td>
+  <td width=169 valign=top style='width:126.65pt;border-top:none;border-left:
+  none;border-bottom:solid windowtext 1.0pt;border-right:solid windowtext 1.0pt;
+  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
+  mso-border-alt:solid windowtext .5pt;padding:0in 5.4pt 0in 5.4pt'>
+  <p class=MsoNormal style='margin-bottom:0in;margin-bottom:.0001pt;line-height:
+  normal'><o:p>&nbsp;</o:p></p>
+  </td>
+ </tr>
  <tr style='mso-yfti-irow:181'>
   <td width=263 style='width:197.2pt;border:solid windowtext 1.0pt;border-top:
   none;mso-border-top-alt:solid windowtext .5pt;mso-border-alt:solid windowtext .5pt;
diff --git a/c++/src/CMakeLists.txt b/c++/src/CMakeLists.txt
index 945b352..2a92ed2 100644
--- a/c++/src/CMakeLists.txt
+++ b/c++/src/CMakeLists.txt
@@ -84,24 +84,26 @@ set (CPP_HDRS
     ${HDF5_CPP_SRC_SOURCE_DIR}/H5VarLenType.h
 )
 
-add_library (${HDF5_CPP_LIB_TARGET} STATIC ${CPP_SOURCES} ${CPP_HDRS})
-target_include_directories(${HDF5_CPP_LIB_TARGET}
-    PRIVATE "${HDF5_SRC_DIR};${HDF5_BINARY_DIR};$<$<BOOL:${HDF5_ENABLE_PARALLEL}>:${MPI_C_INCLUDE_DIRS}>"
-    INTERFACE "$<INSTALL_INTERFACE:$<INSTALL_PREFIX>/include>"
-)
-target_compile_definitions(${HDF5_CPP_LIB_TARGET}
-    PRIVATE $<$<BOOL:${HDF5_ENABLE_PARALLEL}>:MPICH_SKIP_MPICXX;MPICH_IGNORE_CXX_SEEK># Parallel/MPI, prevent spurious cpp/cxx warnings
-)
-TARGET_C_PROPERTIES (${HDF5_CPP_LIB_TARGET} STATIC)
-target_link_libraries (${HDF5_CPP_LIB_TARGET} PUBLIC ${HDF5_LIB_TARGET})
-set_global_variable (HDF5_LIBRARIES_TO_EXPORT "${HDF5_LIBRARIES_TO_EXPORT};${HDF5_CPP_LIB_TARGET}")
-H5_SET_LIB_OPTIONS (${HDF5_CPP_LIB_TARGET} ${HDF5_CPP_LIB_NAME} STATIC 0)
-set_target_properties (${HDF5_CPP_LIB_TARGET} PROPERTIES FOLDER libraries/cpp)
-set (install_targets ${HDF5_CPP_LIB_TARGET})
+if (NOT ONLY_SHARED_LIBS)
+  add_library (${HDF5_CPP_LIB_TARGET} STATIC ${CPP_SOURCES} ${CPP_HDRS})
+  target_include_directories (${HDF5_CPP_LIB_TARGET}
+      PRIVATE "${HDF5_SRC_DIR};${HDF5_BINARY_DIR};$<$<BOOL:${HDF5_ENABLE_PARALLEL}>:${MPI_C_INCLUDE_DIRS}>"
+      INTERFACE "$<INSTALL_INTERFACE:$<INSTALL_PREFIX>/include>"
+  )
+  target_compile_definitions(${HDF5_CPP_LIB_TARGET}
+      PRIVATE $<$<BOOL:${HDF5_ENABLE_PARALLEL}>:MPICH_SKIP_MPICXX;MPICH_IGNORE_CXX_SEEK># Parallel/MPI, prevent spurious cpp/cxx warnings
+  )
+  TARGET_C_PROPERTIES (${HDF5_CPP_LIB_TARGET} STATIC)
+  target_link_libraries (${HDF5_CPP_LIB_TARGET} PUBLIC ${HDF5_LIB_TARGET})
+  set_global_variable (HDF5_LIBRARIES_TO_EXPORT "${HDF5_LIBRARIES_TO_EXPORT};${HDF5_CPP_LIB_TARGET}")
+  H5_SET_LIB_OPTIONS (${HDF5_CPP_LIB_TARGET} ${HDF5_CPP_LIB_NAME} STATIC 0)
+  set_target_properties (${HDF5_CPP_LIB_TARGET} PROPERTIES FOLDER libraries/cpp)
+  set (install_targets ${HDF5_CPP_LIB_TARGET})
+endif ()
 
 if (BUILD_SHARED_LIBS)
   add_library (${HDF5_CPP_LIBSH_TARGET} SHARED ${CPP_SOURCES} ${CPP_HDRS})
-  target_include_directories(${HDF5_CPP_LIBSH_TARGET}
+  target_include_directories (${HDF5_CPP_LIBSH_TARGET}
       PRIVATE "${HDF5_SRC_DIR};${HDF5_BINARY_DIR};$<$<BOOL:${HDF5_ENABLE_PARALLEL}>:${MPI_C_INCLUDE_DIRS}>"
       INTERFACE "$<INSTALL_INTERFACE:$<INSTALL_PREFIX>/include>"
   )
@@ -110,7 +112,14 @@ if (BUILD_SHARED_LIBS)
       PRIVATE $<$<BOOL:${HDF5_ENABLE_PARALLEL}>:MPICH_SKIP_MPICXX;MPICH_IGNORE_CXX_SEEK># Parallel/MPI, prevent spurious cpp/cxx warnings
   )
   TARGET_C_PROPERTIES (${HDF5_CPP_LIBSH_TARGET} SHARED)
-  target_link_libraries (${HDF5_CPP_LIBSH_TARGET} PUBLIC ${HDF5_LIBSH_TARGET})
+  target_link_libraries (${HDF5_CPP_LIBSH_TARGET}
+      PUBLIC ${HDF5_LIBSH_TARGET}
+  )
+  if (MINGW)
+    target_link_options (${HDF5_CPP_LIBSH_TARGET}
+        PRIVATE -static-libgcc -static-libstdc++
+    )
+  endif ()
   set_global_variable (HDF5_LIBRARIES_TO_EXPORT "${HDF5_LIBRARIES_TO_EXPORT};${HDF5_CPP_LIBSH_TARGET}")
   H5_SET_LIB_OPTIONS (${HDF5_CPP_LIBSH_TARGET} ${HDF5_CPP_LIB_NAME} SHARED "CXX")
   set_target_properties (${HDF5_CPP_LIBSH_TARGET} PROPERTIES FOLDER libraries/cpp)
@@ -136,7 +145,9 @@ if (HDF5_EXPORTED_TARGETS)
   if (BUILD_SHARED_LIBS)
     INSTALL_TARGET_PDB (${HDF5_CPP_LIBSH_TARGET} ${HDF5_INSTALL_BIN_DIR} cpplibraries)
   endif ()
-  INSTALL_TARGET_PDB (${HDF5_CPP_LIB_TARGET} ${HDF5_INSTALL_BIN_DIR} cpplibraries)
+  if (NOT ONLY_SHARED_LIBS)
+    INSTALL_TARGET_PDB (${HDF5_CPP_LIB_TARGET} ${HDF5_INSTALL_LIB_DIR} cpplibraries)
+  endif ()
 
   install (
       TARGETS
@@ -163,7 +174,9 @@ set (_PKG_CONFIG_VERSION "${HDF5_PACKAGE_VERSION}")
 
 set (_PKG_CONFIG_LIBS_PRIVATE)
 
-set (_PKG_CONFIG_LIBS "${_PKG_CONFIG_LIBS} -l${HDF5_CPP_LIB_CORENAME}")
+if (NOT ONLY_SHARED_LIBS)
+  set (_PKG_CONFIG_LIBS "${_PKG_CONFIG_LIBS} -l${HDF5_CPP_LIB_CORENAME}")
+endif ()
 if (BUILD_SHARED_LIBS)
   set (_PKG_CONFIG_SH_LIBS "${_PKG_CONFIG_SH_LIBS} -l${HDF5_CPP_LIB_CORENAME}")
 endif ()
@@ -182,7 +195,7 @@ install (
     COMPONENT cpplibraries
 )
 
-if (NOT WIN32)
+if (NOT WIN32 AND NOT MINGW)
   set (_PKG_CONFIG_COMPILER ${CMAKE_CXX_COMPILER})
   configure_file (
       ${HDF_RESOURCES_DIR}/libh5cc.in
diff --git a/c++/src/H5CppDoc.h b/c++/src/H5CppDoc.h
index 0da98a4..5e80408 100644
--- a/c++/src/H5CppDoc.h
+++ b/c++/src/H5CppDoc.h
@@ -53,8 +53,7 @@
  * <br />
  * \section install_sec Installation
  *
- * The HDF5 C++ API is included with the HDF5 source code and can 
- * be obtained from 
+ * The HDF5 C++ API is included with the HDF5 source code.
  * 
  * Please refer to the release_docs/INSTALL file under the top directory 
  * of the HDF5 source code for information about installing, building, 
diff --git a/c++/src/H5DataSet.cpp b/c++/src/H5DataSet.cpp
index db14577..a071289 100644
--- a/c++/src/H5DataSet.cpp
+++ b/c++/src/H5DataSet.cpp
@@ -369,10 +369,10 @@ void DataSet::vlenReclaim(const DataType& type, const DataSpace& space, const DS
     hid_t space_id = space.getId();
     hid_t xfer_plist_id = xfer_plist.getId();
 
-    herr_t ret_value = H5Dvlen_reclaim(type_id, space_id, xfer_plist_id, buf);
+    herr_t ret_value = H5Treclaim(type_id, space_id, xfer_plist_id, buf);
     if (ret_value < 0)
     {
-        throw DataSetIException("DataSet::vlenReclaim", "H5Dvlen_reclaim failed");
+        throw DataSetIException("DataSet::vlenReclaim", "H5Treclaim failed");
     }
 }
 
@@ -397,10 +397,10 @@ void DataSet::vlenReclaim(void* buf, const DataType& type, const DataSpace& spac
     hid_t space_id = space.getId();
     hid_t xfer_plist_id = xfer_plist.getId();
 
-    herr_t ret_value = H5Dvlen_reclaim(type_id, space_id, xfer_plist_id, buf);
+    herr_t ret_value = H5Treclaim(type_id, space_id, xfer_plist_id, buf);
     if (ret_value < 0)
     {
-        throw DataSetIException("DataSet::vlenReclaim", "H5Dvlen_reclaim failed");
+        throw DataSetIException("DataSet::vlenReclaim", "H5Treclaim failed");
     }
 }
 
diff --git a/c++/src/H5DxferProp.h b/c++/src/H5DxferProp.h
index 6955778..e53a03b 100644
--- a/c++/src/H5DxferProp.h
+++ b/c++/src/H5DxferProp.h
@@ -66,7 +66,7 @@ class H5_DLLCPP DSetMemXferPropList : public PropList {
         void getTypeConvCB(H5T_conv_except_func_t *op, void **user_data) const;
 
         // Sets the memory manager for variable-length datatype
-        // allocation in H5Dread and H5Dvlen_reclaim.
+        // allocation in H5Dread and H5Treclaim.
         void setVlenMemManager(H5MM_allocate_t alloc, void* alloc_info,
                                H5MM_free_t free, void* free_info) const;
 
@@ -75,7 +75,7 @@ class H5_DLLCPP DSetMemXferPropList : public PropList {
         void setVlenMemManager() const;
 
         // Gets the memory manager for variable-length datatype
-        // allocation in H5Dread and H5Tvlen_reclaim.
+        // allocation in H5Dread and H5Treclaim.
         void getVlenMemManager(H5MM_allocate_t& alloc, void** alloc_info,
                                H5MM_free_t& free, void** free_info) const;
 
diff --git a/c++/src/H5FaccProp.cpp b/c++/src/H5FaccProp.cpp
index 1657351..5a478e7 100644
--- a/c++/src/H5FaccProp.cpp
+++ b/c++/src/H5FaccProp.cpp
@@ -696,10 +696,16 @@ unsigned FileAccPropList::getGcReferences() const
 ///             Valid values of \a libver_low are as follows:
 ///             \li \c H5F_LIBVER_EARLIEST   (Default)
 ///             \li \c H5F_LIBVER_18
+///             \li \c H5F_LIBVER_110
+///             \li \c H5F_LIBVER_112
+///             \li \c H5F_LIBVER_114
 ///             \li \c H5F_LIBVER_LATEST
 ///
 ///             Valid values of \a libver_high are as follows:
 ///             \li \c H5F_LIBVER_18
+///             \li \c H5F_LIBVER_110
+///             \li \c H5F_LIBVER_112
+///             \li \c H5F_LIBVER_114
 ///             \li \c H5F_LIBVER_LATEST   (Default)
 ///
 ///             For more detail, please refer to the H5Pset_libver_bounds API in
@@ -729,10 +735,16 @@ void FileAccPropList::setLibverBounds(H5F_libver_t libver_low, H5F_libver_t libv
 ///             values:
 ///             \li \c H5F_LIBVER_EARLIEST
 ///             \li \c H5F_LIBVER_18
+///             \li \c H5F_LIBVER_110
+///             \li \c H5F_LIBVER_112
+///             \li \c H5F_LIBVER_114
 ///             \li \c H5F_LIBVER_LATEST
 ///
 ///             and \a libver_high:
 ///             \li \c H5F_LIBVER_18
+///             \li \c H5F_LIBVER_110
+///             \li \c H5F_LIBVER_112
+///             \li \c H5F_LIBVER_114
 ///             \li \c H5F_LIBVER_LATEST
 // Programmer   Binh-Minh Ribler - March, 2015
 //--------------------------------------------------------------------------
diff --git a/c++/src/H5File.cpp b/c++/src/H5File.cpp
index 07d7e84..b9ecded 100644
--- a/c++/src/H5File.cpp
+++ b/c++/src/H5File.cpp
@@ -192,16 +192,17 @@ H5File::H5File(const H5File& original) : Group()
 //--------------------------------------------------------------------------
 bool H5File::isHdf5(const char* name)
 {
-    // Calls C routine H5Fis_hdf5 to determine whether the file is in
+    // Calls C routine H5Fis_accessible to determine whether the file is in
     // HDF5 format.  It returns positive value, 0, or negative value
-    htri_t ret_value = H5Fis_hdf5(name);
+    htri_t ret_value = H5Fis_accessible(name, H5P_DEFAULT);
+
     if (ret_value > 0)
         return true;
     else if (ret_value == 0)
         return false;
-    else // Raise exception when H5Fis_hdf5 returns a negative value
+    else // Raise exception when H5Fis_accessible returns a negative value
     {
-        throw FileIException("H5File::isHdf5", "H5Fis_hdf5 returned negative value");
+        throw FileIException("H5File::isHdf5", "H5Fis_accessible returned negative value");
     }
 }
 
@@ -218,6 +219,46 @@ bool H5File::isHdf5(const H5std_string& name)
 }
 
 //--------------------------------------------------------------------------
+// Function:    H5File::isAccessible (static)
+///\brief       Determines whether a file can be accessed as HDF5. (Static)
+///\param       name - IN: Name of the file
+///\param       access_plist - IN: File access property list.  Default to
+///             FileAccPropList::DEFAULT
+///\return      true if the file can be accessed as HDF5, and false, otherwise
+///\exception   H5::FileIException
+// September 2018
+//--------------------------------------------------------------------------
+bool H5File::isAccessible(const char* name, const FileAccPropList& access_plist)
+{
+    // Calls C routine H5Fis_accessible to determine whether the file is in
+    // HDF5 format.  It returns positive value, 0, or negative value
+    hid_t access_plist_id = access_plist.getId();
+    htri_t ret_value = H5Fis_accessible(name, access_plist_id);
+    if (ret_value > 0)
+        return true;
+    else if (ret_value == 0)
+        return false;
+    else // Raise exception when H5Fis_accessible returns a negative value
+    {
+        throw FileIException("H5File::isAccessible", "H5Fis_accessible returned negative value");
+    }
+}
+
+//--------------------------------------------------------------------------
+// Function:    H5File::isAccessible (static)
+///\brief       This is an overloaded member function, provided for convenience.
+///             It takes an \c H5std_string for \a name. (Static)
+///\param       name - IN: Name of the file - \c H5std_string
+///\param       access_plist - IN: File access property list.  Default to
+///             FileAccPropList::DEFAULT
+// September 2018
+//--------------------------------------------------------------------------
+bool H5File::isAccessible(const H5std_string& name, const FileAccPropList& access_plist)
+{
+    return(isAccessible(name.c_str(), access_plist));
+}
+
+//--------------------------------------------------------------------------
 // Function:    openFile
 ///\brief       Opens an HDF5 file
 ///\param       name         - IN: Name of the file
@@ -539,6 +580,27 @@ hsize_t H5File::getFileSize() const
 }
 
 //--------------------------------------------------------------------------
+// Function:    H5File::getFileNum
+///\brief       Returns the file number of the HDF5 file.
+///\return      File number
+///\exception   H5::FileIException
+///\par Description
+///             This function is called after an existing file is opened in
+///             order to retrieve the unique 'file number' for the file.
+// Programmer   Quincey Koziol - April 13, 2019
+//--------------------------------------------------------------------------
+unsigned long H5File::getFileNum() const
+{
+    unsigned long fileno = 0;
+    herr_t ret_value = H5Fget_fileno(id, &fileno);
+    if (ret_value < 0)
+    {
+        throw FileIException("H5File::getFileNum", "H5Fget_fileno failed");
+    }
+    return (fileno);
+}
+
+//--------------------------------------------------------------------------
 // Function:    H5File::getId
 ///\brief       Get the id of this file
 ///\return      File identifier
diff --git a/c++/src/H5File.h b/c++/src/H5File.h
index 473428a..1b1227f 100644
--- a/c++/src/H5File.h
+++ b/c++/src/H5File.h
@@ -69,10 +69,17 @@ class H5_DLLCPP H5File : public Group {
         // Returns the file size of the HDF5 file.
         hsize_t getFileSize() const;
 
+        // Returns the 'file number' of the HDF5 file.
+        unsigned long getFileNum() const;
+
         // Determines if a file, specified by its name, is in HDF5 format
         static bool isHdf5(const char* name);
         static bool isHdf5(const H5std_string& name);
 
+        // Determines if a file, specified by its name, can be accessed as HDF5
+        static bool isAccessible(const char* name, const FileAccPropList& access_plist = FileAccPropList::DEFAULT);
+        static bool isAccessible(const H5std_string& name, const FileAccPropList& access_plist = FileAccPropList::DEFAULT);
+
         // Reopens this file.
         void reOpen();  // added for better name
 
diff --git a/c++/src/H5IdComponent.cpp b/c++/src/H5IdComponent.cpp
index a041273..40520aa 100644
--- a/c++/src/H5IdComponent.cpp
+++ b/c++/src/H5IdComponent.cpp
@@ -174,8 +174,8 @@ H5I_type_t IdComponent::getHDFObjType() const
 ///             \li \c H5I_DATASPACE
 ///             \li \c H5I_DATASET
 ///             \li \c H5I_ATTR
-///             \li \c H5I_REFERENCE (DEPRECATED)
 ///             \li \c H5I_VFL
+///             \li \c H5I_VOL
 ///             \li \c H5I_GENPROP_CLS
 ///             \li \c H5I_GENPROP_LST
 ///             \li \c H5I_ERROR_CLASS
@@ -227,8 +227,8 @@ bool IdComponent::isValid(hid_t an_id)
 ///             \li \c H5I_DATASPACE
 ///             \li \c H5I_DATASET
 ///             \li \c H5I_ATTR
-///             \li \c H5I_REFERENCE (DEPRECATED)
 ///             \li \c H5I_VFL
+///             \li \c H5I_VOL
 ///             \li \c H5I_GENPROP_CLS
 ///             \li \c H5I_GENPROP_LST
 ///             \li \c H5I_ERROR_CLASS
diff --git a/c++/src/H5LaccProp.h b/c++/src/H5LaccProp.h
index 70890b3..ec5e54f 100644
--- a/c++/src/H5LaccProp.h
+++ b/c++/src/H5LaccProp.h
@@ -12,9 +12,6 @@
  * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
-// Class LinkAccPropList represents the HDF5 file access property list and
-// inherits from DataType.
-
 #ifndef __H5LinkAccPropList_H
 #define __H5LinkAccPropList_H
 
@@ -22,15 +19,15 @@ namespace H5 {
 
 /*! \class LinkAccPropList
     \brief Class LinkAccPropList inherits from PropList and provides
-    wrappers for the HDF5 file access property list.
+    wrappers for the HDF5 link access property list.
 */
 // Inheritance: PropList -> IdComponent
 class H5_DLLCPP LinkAccPropList : public PropList {
    public:
-        ///\brief Default file access property list.
+        ///\brief Default link access property list.
         static const LinkAccPropList& DEFAULT;
 
-        // Creates a file access property list.
+        // Creates a link access property list.
         LinkAccPropList();
 
         ///\brief Returns this class name.
@@ -39,7 +36,7 @@ class H5_DLLCPP LinkAccPropList : public PropList {
         // Copy constructor: same as the original LinkAccPropList.
         LinkAccPropList(const LinkAccPropList& original);
 
-        // Creates a copy of an existing file access property list
+        // Creates a copy of an existing link access property list
         // using the property list id.
         LinkAccPropList (const hid_t plist_id);
 
diff --git a/c++/src/H5LcreatProp.cpp b/c++/src/H5LcreatProp.cpp
index 695c1fe..bde9339 100644
--- a/c++/src/H5LcreatProp.cpp
+++ b/c++/src/H5LcreatProp.cpp
@@ -103,6 +103,46 @@ LinkCreatPropList::LinkCreatPropList(const LinkCreatPropList& original) : PropLi
 LinkCreatPropList::LinkCreatPropList(const hid_t plist_id) : PropList(plist_id) {}
 
 //--------------------------------------------------------------------------
+// Function:    LinkCreatPropList::setCreateIntermediateGroup
+///\brief       Specifies in property list whether to create missing
+///             intermediate groups.
+///\param       crt_intmd_group - IN: Flag specifying whether to create
+///                               intermediate groups upon the creation of an object
+///\exception   H5::PropListIException
+// April, 2019
+//--------------------------------------------------------------------------
+void LinkCreatPropList::setCreateIntermediateGroup(bool crt_intmd_group) const
+{
+    herr_t ret_value = H5Pset_create_intermediate_group(id, (unsigned)crt_intmd_group);
+    // Throw exception if H5Pset_create_intermediate_group returns failure
+    if (ret_value < 0)
+    {
+        throw PropListIException("setCreateIntermediateGroup", "H5Pset_create_intermediate_group failed");
+    }
+}
+
+//--------------------------------------------------------------------------
+// Function:    LinkCreatPropList::getCreateIntermediateGroup
+///\brief       Determines whether property is set to enable creating missing
+///             intermediate groups.
+///\return      true if creating intermediate groups is enabled, and false, otherwise
+///\exception   H5::PropListIException
+// April, 2019
+//--------------------------------------------------------------------------
+bool LinkCreatPropList::getCreateIntermediateGroup() const
+{
+    unsigned crt_intmd_group;
+    herr_t ret_value = H5Pget_create_intermediate_group(id, &crt_intmd_group);
+    // Throw exception if H5Pget_create_intermediate_group returns failure
+    if (ret_value < 0)
+    {
+        throw PropListIException("getCreateIntermediateGroup", "H5Pget_create_intermediate_group failed");
+    }
+
+    return((bool)crt_intmd_group);
+}
+
+//--------------------------------------------------------------------------
 // Function:    LinkCreatPropList::setCharEncoding
 ///\brief       Sets the character encoding of the string.
 ///
diff --git a/c++/src/H5LcreatProp.h b/c++/src/H5LcreatProp.h
index 12cb479..908ef63 100644
--- a/c++/src/H5LcreatProp.h
+++ b/c++/src/H5LcreatProp.h
@@ -12,9 +12,6 @@
  * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
-// Class LinkCreatPropList represents the HDF5 file access property list and
-// inherits from DataType.
-
 #ifndef __H5LinkCreatPropList_H
 #define __H5LinkCreatPropList_H
 
@@ -22,15 +19,15 @@ namespace H5 {
 
 /*! \class LinkCreatPropList
     \brief Class LinkCreatPropList inherits from PropList and provides
-    wrappers for the HDF5 file access property list.
+    wrappers for the HDF5 link creation property list.
 */
 // Inheritance: PropList -> IdComponent
 class H5_DLLCPP LinkCreatPropList : public PropList {
    public:
-        ///\brief Default file access property list.
+        ///\brief Default link creation property list.
         static const LinkCreatPropList& DEFAULT;
 
-        // Creates a file access property list.
+        // Creates a link creation property list.
         LinkCreatPropList();
 
         ///\brief Returns this class name.
@@ -39,10 +36,18 @@ class H5_DLLCPP LinkCreatPropList : public PropList {
         // Copy constructor: same as the original LinkCreatPropList.
         LinkCreatPropList(const LinkCreatPropList& original);
 
-        // Creates a copy of an existing file access property list
+        // Creates a copy of an existing link creation property list
         // using the property list id.
         LinkCreatPropList (const hid_t plist_id);
 
+        // Specifies in property list whether to create missing
+        // intermediate groups
+        void setCreateIntermediateGroup(bool crt_intmd_group) const;
+
+        // Determines whether property is set to enable creating missing
+        // intermediate groups
+        bool getCreateIntermediateGroup() const;
+
         // Sets the character encoding of the string.
         void setCharEncoding(H5T_cset_t encoding) const;
 
diff --git a/c++/src/H5Location.cpp b/c++/src/H5Location.cpp
index 2c49016..2641960 100644
--- a/c++/src/H5Location.cpp
+++ b/c++/src/H5Location.cpp
@@ -1066,7 +1066,7 @@ void H5Location::link(const char *curr_name, const Group& new_loc,
     hid_t lcpl_id = lcpl.getId();
     hid_t lapl_id = lapl.getId();
 
-    ret_value = H5Lcreate_hard(getId(), curr_name, new_loc.getId(), new_name, H5P_DEFAULT, H5P_DEFAULT);
+    ret_value = H5Lcreate_hard(getId(), curr_name, new_loc_id, new_name, lcpl_id, lapl_id);
    if (ret_value < 0)
         throwException("link", "creating link failed");
 }
@@ -1102,14 +1102,13 @@ void H5Location::link(const H5std_string& curr_name, const Group& new_loc,
 ///             H5Lcreate_hard APIs in the HDF5 C Reference Manual.
 //  March 2018
 //--------------------------------------------------------------------------
-void H5Location::link(const char *curr_name, const hid_t same_loc,
-             const char *new_name, const LinkCreatPropList& lcpl, const LinkAccPropList& lapl) const
+void H5Location::link(const char *curr_name, const hid_t same_loc, const char *new_name, const LinkCreatPropList& lcpl, const LinkAccPropList& lapl) const
 {
     herr_t ret_value = -1;
     hid_t lcpl_id = lcpl.getId();
     hid_t lapl_id = lapl.getId();
 
-    ret_value = H5Lcreate_hard(getId(), curr_name, same_loc, new_name, H5P_DEFAULT, H5P_DEFAULT);
+    ret_value = H5Lcreate_hard(getId(), curr_name, same_loc, new_name, lcpl_id, lapl_id);
 
    if (ret_value < 0)
         throwException("link", "creating link failed");
diff --git a/c++/src/H5Object.cpp b/c++/src/H5Object.cpp
index 1c22efe..8d3334b 100644
--- a/c++/src/H5Object.cpp
+++ b/c++/src/H5Object.cpp
@@ -40,9 +40,8 @@
 namespace H5 {
 
 #ifndef DOXYGEN_SHOULD_SKIP_THIS
-// userAttrOpWrpr simply interfaces between the user's function and the
-// C library function H5Aiterate2; used to resolve the different prototype
-// problem.  May be moved to Iterator later.
+// userAttrOpWrpr interfaces between the user's function and the
+// C library function H5Aiterate2
 extern "C" herr_t userAttrOpWrpr(hid_t loc_id, const char *attr_name,
     const H5A_info_t *ainfo, void *op_data)
 {
@@ -52,6 +51,17 @@ extern "C" herr_t userAttrOpWrpr(hid_t loc_id, const char *attr_name,
     return 0;
 }
 
+// userVisitOpWrpr interfaces between the user's function and the
+// C library function H5Ovisit2
+extern "C" herr_t userVisitOpWrpr(hid_t obj_id, const char *attr_name,
+    const H5O_info_t *obj_info, void *op_data)
+{
+    H5std_string s_attr_name = H5std_string(attr_name);
+    UserData4Visit* myData = reinterpret_cast<UserData4Visit *> (op_data);
+    int status = myData->op(*myData->obj, s_attr_name, obj_info, myData->opData);
+    return status;
+}
+
 //--------------------------------------------------------------------------
 // Function:    H5Object default constructor (protected)
 // Programmer   Binh-Minh Ribler - 2000
@@ -197,8 +207,6 @@ Attribute H5Object::openAttribute(const unsigned int idx) const
 ///\par Description
 ///             The signature of user_op is
 ///             void (*)(H5::H5Location&, H5std_string, void*).
-///             For information, please refer to the H5Aiterate2 API in
-///             the HDF5 C Reference Manual.
 // Programmer   Binh-Minh Ribler - 2000
 //--------------------------------------------------------------------------
 int H5Object::iterateAttrs(attr_operator_t user_op, unsigned *_idx, void *op_data)
@@ -228,6 +236,61 @@ int H5Object::iterateAttrs(attr_operator_t user_op, unsigned *_idx, void *op_dat
 }
 
 //--------------------------------------------------------------------------
+// Function:    H5Object::visit
+///\brief       Recursively visits all HDF5 objects accessible from this object.
+///\param       idx_type - IN: Type of index; valid values include:
+///             \li \c H5_INDEX_NAME
+///             \li \c H5_INDEX_CRT_ORDER
+///\param       order - IN: Order in which index is traversed; valid values include:
+///             \li \c H5_ITER_DEC
+///             \li \c H5_ITER_INC
+///             \li \c H5_ITER_NATIVE
+///\param       user_op  - IN: Callback function passing data regarding the
+///                            object to the calling application
+///\param       *op_data - IN: User-defined pointer to data required by the
+///                            application for its processing of the object
+///\param       fields   - IN: Flags specifying the fields to be retrieved
+///                            to the callback op via the H5O_info_t argument.
+///             \li \c H5O_INFO_BASIC      fileno, addr, type, and rc fields
+///             \li \c H5O_INFO_TIME       atime, mtime, ctime, and btime fields
+///             \li \c H5O_INFO_NUM_ATTRS  num_attrs field
+///             \li \c H5O_INFO_HDR        hdr field
+///             \li \c H5O_INFO_META_SIZE  meta_size field
+///             \li \c H5O_INFO_ALL        H5O_INFO_BASIC | H5O_INFO_TIME | H5O_INFO_NUM_ATTRS | H5O_INFO_HDR | H5O_INFO_META_SIZE
+///\return
+///             \li On success:
+///                 \li the return value of the first operator that returns a positive value
+///                 \li zero if all members were processed with no operator returning non-zero
+///             \li On failure:
+///                 \li an exception Exception will be thrown if something went
+///                     wrong within the library or the operator failed
+///\exception   H5::Exception
+///\par Description
+///             For information, please refer to the H5Ovisit2 API in the HDF5
+///             C Reference Manual.
+// Programmer   Binh-Minh Ribler - Feb, 2019
+//--------------------------------------------------------------------------
+void H5Object::visit(H5_index_t idx_type, H5_iter_order_t order, visit_operator_t user_op, void *op_data, unsigned int fields)
+{
+    // Store the user's function and data
+    UserData4Visit* userData = new UserData4Visit;
+    userData->opData = op_data;
+    userData->op = user_op;
+    userData->obj = this;
+
+    // Call the C API passing in op wrapper and info
+    herr_t ret_value = H5Ovisit2(getId(), idx_type, order, userVisitOpWrpr, static_cast<void *>(userData), fields);
+
+    // Release memory
+    delete userData;
+
+    // Throw exception if H5Ovisit2 failed, which could be a failure in
+    // the library or in the call back operator
+    if (ret_value < 0)
+        throw Exception(inMemFunc("visit"), "H5Ovisit2 failed");
+}
+
+//--------------------------------------------------------------------------
 // Function:    H5Object::objVersion
 ///\brief       Returns the header version of this HDF5 object.
 ///\return      Object version, which can have the following values:
diff --git a/c++/src/H5Object.h b/c++/src/H5Object.h
index 10b3865..4a4e909 100644
--- a/c++/src/H5Object.h
+++ b/c++/src/H5Object.h
@@ -40,16 +40,30 @@ namespace H5 {
 // Inheritance: H5Location -> IdComponent
 
 // Define the operator function pointer for H5Aiterate().
-typedef void (*attr_operator_t)(H5Object& loc/*in*/,
-                                 const H5std_string attr_name/*in*/,
-                                 void *operator_data/*in,out*/);
+typedef void (*attr_operator_t)(H5Object& loc,
+                                 const H5std_string attr_name,
+                                 void *operator_data);
+
+// Define the operator function pointer for H5Ovisit2().
+typedef int (*visit_operator_t)(H5Object& obj,
+                                 const H5std_string attr_name,
+                                 const H5O_info_t *oinfo,
+                                 void *operator_data);
 
 // User data for attribute iteration
 class UserData4Aiterate {
     public:
         attr_operator_t op;
         void* opData;
-        H5Object* location;
+        H5Object* location; // Consider changing to H5Location
+};
+
+// User data for visit iteration
+class UserData4Visit {
+    public:
+        visit_operator_t op;
+        void* opData;
+        H5Object* obj;
 };
 
 class H5_DLLCPP H5Object : public H5Location {
@@ -71,6 +85,9 @@ class H5_DLLCPP H5Object : public H5Location {
         // Iterate user's function over the attributes of this object.
         int iterateAttrs(attr_operator_t user_op, unsigned* idx = NULL, void* op_data = NULL);
 
+        // Recursively visit elements reachable from this object.
+        void visit(H5_index_t idx_type, H5_iter_order_t order, visit_operator_t user_op, void *op_data, unsigned int fields);
+
         // Returns the object header version of an object
         unsigned objVersion() const;
 
@@ -98,6 +115,7 @@ class H5_DLLCPP H5Object : public H5Location {
         ssize_t getObjName(H5std_string& obj_name, size_t len = 0) const;
         H5std_string getObjName() const;
 
+
 #ifndef DOXYGEN_SHOULD_SKIP_THIS
 
    protected:
diff --git a/c++/src/H5PropList.cpp b/c++/src/H5PropList.cpp
index 1918d27..a01878c 100644
--- a/c++/src/H5PropList.cpp
+++ b/c++/src/H5PropList.cpp
@@ -149,8 +149,8 @@ PropList::PropList(const hid_t plist_id) : IdComponent()
         case H5I_DATASPACE:
         case H5I_DATASET:
         case H5I_ATTR:
-        case H5I_REFERENCE:
         case H5I_VFL:
+        case H5I_VOL:
         case H5I_ERROR_CLASS:
         case H5I_ERROR_MSG:
         case H5I_ERROR_STACK:
diff --git a/c++/src/cpp_doc_config b/c++/src/cpp_doc_config
index c771e8b..71db7f6 100644
--- a/c++/src/cpp_doc_config
+++ b/c++/src/cpp_doc_config
@@ -38,7 +38,7 @@ PROJECT_NAME           =
 # could be handy for archiving the generated documentation or if some version
 # control system is used.
 
-PROJECT_NUMBER         = "1.11.3"
+PROJECT_NUMBER         = "1.13.0"
 
 # Using the PROJECT_BRIEF tag one can provide an optional one line description
 # for a project that appears at the top of each page and should give viewer a