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<html>
<head><title>
HDF5 API Specification
</title></head>
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<a href="H5.intro.html">Introduction to HDF5</a>&nbsp;<br>
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<center>
<h1>HDF5: API Specification<br>Reference Manual</h1>

<!-- Following line(s) for Fortran90-only releases only
     <h3>Released: July 2000</h3>
     <h3>Software based on HDF5 R1.2.2<br>Documentation based on HDF5 R1.2.3 
     (unreleased development version)</h3>
-->

</center>
The HDF5 library provides several interfaces, each of which provides the 
tools required to meet specific aspects of the HDF5 data-handling requirements.
<p>
See <a href="#F90andCPPlus">below</a> for the FORTRAN90 and C++ APIs.
<p>

<center>
<table border=0>

<tr><td valign=top><a href="RM_H5.html">Library Functions</a>
    </td><td>&nbsp;&nbsp;&nbsp;&nbsp;</td><td valign=top>The general-purpose <strong>H5</strong> functions.
</td></tr>
<tr><td valign=top><a href="RM_H5A.html">Attribute Interface</a>
    </td><td></td><td valign=top>The <strong>H5A</strong> API for attributes.
</td></tr>
<tr><td valign=top><a href="RM_H5D.html">Dataset Interface</a>
    </td><td></td><td valign=top>The <strong>H5D</strong> API for manipulating scientific datasets. 
</td></tr>
<tr><td valign=top><a href="RM_H5E.html">Error Interface</a>
    </td><td></td><td valign=top>The <strong>H5E</strong> API for error handling.
</td></tr>
<tr><td valign=top><a href="RM_H5F.html">File Interface</a>
    </td><td></td><td valign=top>The <strong>H5F</strong> API for accessing HDF files.
</td></tr>
<tr><td valign=top><a href="RM_H5G.html">Group Interface</a>
    </td><td></td><td valign=top>The <strong>H5G</strong> API for creating physical groups of objects on disk.
</td></tr>
<tr><td valign=top><a href="RM_H5I.html">Identifier Interface</a>
    </td><td></td><td valign=top>The <strong>H5I</strong> API for working with object identifiers.
</td></tr>
<tr><td valign=top><a href="RM_H5P.html">Property List Interface</a>
    </td><td></td><td valign=top>The <strong>H5P</strong> API for manipulating object property lists.
</td></tr>
<tr><td valign=top><a href="RM_H5R.html">Reference Interface</a>
    </td><td></td><td valign=top>The <strong>H5R</strong> API for references.
</td></tr>
<tr><td valign=top><a href="RM_H5S.html">Dataspace Interface</a>
    </td><td></td><td valign=top>The <strong>H5S</strong> API for defining dataset dataspace.
</td></tr>
<tr><td valign=top><a href="RM_H5T.html">Datatype Interface</a>
    </td><td></td><td valign=top>The <strong>H5T</strong> API for defining dataset element information.
</td></tr>
<tr><td valign=top><a href="RM_H5Z.html">Compression Interface</a>
    </td><td></td><td valign=top>The <strong>H5Z</strong> API for compression.
</td></tr>
<tr><td valign=top><a href="Tools.html">Tools</a>
    </td><td></td><td valign=top>Interactive tools for the examination of existing HDF5 files.
</td></tr>
<tr><td valign=top><a href="PredefDTypes.html">Predefined Datatypes</a>
    </td><td></td><td valign=top>Predefined datatypes in HDF5.
<!--
</td></tr>
<tr><td valign=top><a href="Glossary.html">Glossary</a>
    </td><td></td><td valign=top>A glossary of data-types used in the APIs.
-->
</td></tr>
<tr><td valign=top><hr noshade size=1>Experimental interface:<br><a href="RM_H5RA.html">Ragged Arrays</a>&nbsp;&nbsp;
    </td><td></td><td valign=top><hr noshade size=1><br>The <strong>H5RA</strong> API for ragged arrays.


</td></tr>
</table>
</center>

<a name="F90andCPPlus">
<hr>
<p align=right>To top of <a href="#TopofRM"><cite>Reference Manual</cite></a>.
<h3>The Fortran90 and C++ APIs to HDF5</h3>
</a>

The HDF5 Library distribution now includes FORTRAN90 and C++ APIs.
These APIs are described in the following documents.

<p>
<strong>Fortran90 API</strong>
    <dir>
    <a href="fortran/F90UserNotes.html" target="External">
    <cite>HDF5 FORTRAN90 User's Notes</cite></a>
    contains general information regarding the API.
    Specific information on each API call is found in the 
    <cite>Reference Manual</cite>.
    <p>
    <u>Fortran90 APIs in the <cite>Reference Manual</cite>:</u>
    The current version of the <cite>HDF5 Reference Manual</cite> includes 
    a description of the FORTRAN90 API to HDF5.
    Fortran subroutines exist in the H5A, H5D, H5E, H5F, H5G, H5I, H5P, 
    H5R, H5S, and H5T interfaces and are described on those pages.
    <p>  
    In general, each Fortran subroutine performs exactly the same task 
    as the corresponding C function.  The links at the top of each reference 
    manual section go to the C function descriptions, which serve as general 
    descriptions for both the C and Fortran APIs.  A button, under 
    <strong>Non-C API(s)</strong> at the end of the C function description,
    opens an external browser window displaying the Fortran-specific 
    information.  You will probably want to adjust the size and location of 
    this external window so that both browser windows are visible and to 
    facilitate moving easily between them.
    </dir>

<strong>C++ API</strong>
    <dir>
    <a href="cpplus/CppUserNotes.pdf" target="External">
    <cite>HDF5 C++ User's Notes</cite></a>
    <p>
    <a href="cpplus/CppInterfaces.html" target="External">
    <cite>HDF5 C++ Interfaces</cite></a>
    </dir>


<br><br>

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<tr><td valign=top align=left>
<a href="H5.intro.html">Introduction to HDF5</a>&nbsp;<br>
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<a href="RM_H5Z.html">H5Z</a>&nbsp;&nbsp;
<a href="Tools.html">Tools</a>&nbsp;&nbsp;
<a href="PredefDTypes.html">Datatypes</a>&nbsp;&nbsp;
-->
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<address>
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<a href="mailto:hdfhelp@ncsa.uiuc.edu">HDF Help Desk</a> 
<br>
Last modified:  9 January 2001
<br>
Describes HDF5 Release 1.4 Beta, December 2000

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