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+<html>
+<body>
+
+<h1>Object Headers</h1>
+
+<pre>
+
+haddr_t
+H5O_new (hdf5_file_t *f, intn nrefs, size_t size_hint)
+
+	Creates a new empty object header and returns its address.
+	The SIZE_HINT is the initial size of the data portion of the
+	object header and NREFS is the number of symbol table entries
+	that reference this object header (normally one).
+
+	If SIZE_HINT is too small, then at least some default amount
+	of space is allocated for the object header.
+
+intn				        /*num remaining links		*/
+H5O_link (hdf5_file_t *f,		/*file containing header	*/
+	  haddr_t addr,			/*header file address		*/
+	  intn adjust)			/*link adjustment amount	*/
+
+
+size_t
+H5O_sizeof (hdf5_file_t *f,		/*file containing header	*/
+	    haddr_t addr,		/*header file address		*/
+            H5O_class_t *type,		/*message type or H5O_ANY	*/
+	    intn sequence)		/*sequence number, usually zero	*/
+		
+	Returns the size of a particular instance of a message in an
+	object header.  When an object header has more than one
+	instance of a particular message type, then SEQUENCE indicates
+	which instance to return.
+
+void *
+H5O_read (hdf5_file_t *f,		/*file containing header	*/
+	  haddr_t addr,			/*header file address		*/
+	  H5G_entry_t *ent,		/*optional symbol table entry	*/
+	  H5O_class_t *type,		/*message type or H5O_ANY	*/
+	  intn sequence,		/*sequence number, usually zero	*/
+	  size_t size,			/*size of output message	*/
+	  void *mesg)			/*output buffer			*/
+
+	Reads a message from the object header into memory.
+
+const void *
+H5O_peek (hdf5_file_t *f,		/*file containing header	*/
+          haddr_t addr,			/*header file address		*/
+	  H5G_entry_t *ent,		/*optional symbol table entry	*/
+	  H5O_class_t *type,		/*type of message or H5O_ANY	*/
+	  intn sequence)		/*sequence number, usually zero	*/
+
+haddr_t					/*new heap address		*/
+H5O_modify (hdf5_file_t *f,		/*file containing header	*/
+            haddr_t addr,		/*header file address		*/
+	    H5G_entry_t *ent,		/*optional symbol table entry	*/
+	    hbool_t *ent_modified,	/*entry modification flag	*/
+	    H5O_class_t *type,		/*message type			*/
+	    intn overwrite,		/*sequence number or -1		*/
+	    void *mesg)			/*the message			*/  
+	  
+
+===========================================
+Last Modified:  8 July 1998 (technical content)
+Last Modified:  28 April 2000 (included in HDF5 Technical Notes)
+HDF Help Desk:  hdfhelp@ncsa.uiuc.edu
+
+</pre>
+
+</body>
+</html>