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<div style="background:#FFDDDD;font-size:120%;text-align:center;margin:0;padding:5px">Please, help us to better serve our user community by answering the following short survey: <a href="https://www.hdfgroup.org/website-survey/">https://www.hdfgroup.org/website-survey/</a></div>
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<div id="projectname"><a href="https://www.hdfgroup.org">HDF5</a>
&#160;<span id="projectnumber">1.15.0.33bb197</span>
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<div id="projectbrief">API Reference</div>
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<div class="textblock"><p>Navigate back: <a class="el" href="index.html">Main</a> / <a class="el" href="_getting_started.html">Getting Started with HDF5</a> / <a class="el" href="_learn_basics.html">Learning the Basics</a> </p><hr />
<p>Keep the following in mind when looking at the example programs included in this tutorial:</p>
<h1><a class="anchor" id="LBProgAPI"></a>
APIs vary with different languages</h1>
<ul>
<li>C routines begin with the prefix “H5*” where * is a single letter indicating the object on which the operation is to be performed: <table class="doxtable">
<tr>
<td>File Interface: </td><td><a class="el" href="group___h5_f.html#gaa3f4f877b9bb591f3880423ed2bf44bc" title="Opens an existing HDF5 file.">H5Fopen</a> </td></tr>
<tr>
<td>Dataset Interface: </td><td><a class="el" href="_h5version_8h.html#a7dba2e5b2045f31c0932123ffb54f7a3">H5Dopen</a> </td></tr>
</table>
</li>
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<ul>
<li>FORTRAN routines begin with “h5*” and end with “_f”: <table class="doxtable">
<tr>
<td>File Interface: </td><td>h5fopen_f </td></tr>
<tr>
<td>Dataset Interface: </td><td>h5dopen_f </td></tr>
</table>
</li>
</ul>
<ul>
<li>Java routine names begin with “H5*” and are prefixed with “H5.” as the class. Constants are in the HDF5Constants class and are prefixed with "HDF5Constants.".: <table class="doxtable">
<tr>
<td>File Interface: </td><td>H5.H5Fopen </td></tr>
<tr>
<td>Dataset Interface: </td><td>H5.H5Dopen </td></tr>
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</li>
</ul>
<ul>
<li>APIS for languages like C++, Java, and Python use methods associated with specific objects.</li>
</ul>
<h1><a class="anchor" id="LBProgTypes"></a>
HDF5 library has its own defined types</h1>
<ul>
<li><a class="el" href="_h5_ipublic_8h.html#a0045db7ff9c22ad35db6ae91662e1943">hid_t</a> is used for object handles </li>
<li>hsize_t is used for dimensions </li>
<li><a class="el" href="_h5public_8h.html#a3b079ecf932a5c599499cf7e298af160">herr_t</a> is used for many return values</li>
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Language specific files must be included in applications</h1>
<ul>
<li>
Python: Add <code>"import h5py / import numpy"</code> </li>
<li>
C: Add <code>"#include hdf5.h"</code> </li>
<li>
FORTRAN: Add <code>"USE HDF5"</code> and call h5open_f and h5close_f to initialize and close the HDF5 FORTRAN interface </li>
<li>
Java: Add <code>"import hdf.hdf5lib.H5;
import hdf.hdf5lib.HDF5Constants;"</code> </li>
</ul>
<p>Navigate back: <a class="el" href="index.html">Main</a> / <a class="el" href="_getting_started.html">Getting Started with HDF5</a> / <a class="el" href="_learn_basics.html">Learning the Basics</a> </p>
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