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<html>
<head><title>
HDF5/H5I API Specification
</title></head>
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<center>
<h1>H5I: Identifier Interface</h1>
</center>
<h2>Identifier API Functions</h2>
This function provides a tool for working with object identifiers.
<p>
<strong>The C Interface:</strong>
<table border=0>
<tr><td valign=top>
<ul>
<li><a href="#Identify-GetType">H5Iget_type</a>
</ul>
</td><td> </td><td valign=top>
<ul>
</ul>
</td><td> </td><td valign=top>
<ul>
</ul>
</td></tr>
</table>
<p>
<strong>The FORTRAN90 Interface:</strong>
<br>
<font size=-1>
<i>In general, each FORTRAN90 subroutine performs exactly the same task
as the corresponding C function. The links below go to the C function
descriptions, which serve as general descriptions for both. A button,
under <strong>Non-C API(s)</strong> at the end of the C function description,
opens an external browser window displaying the FORTRAN90-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.</i>
</font>
<table border=0>
<tr><td valign=top>
<ul>
<li><a href="#Identify-GetType">h5iget_type_f</a>
</ul>
</td><td> </td><td valign=top>
<ul>
</ul>
</td><td> </td><td valign=top>
<ul>
</ul>
</td></tr>
</table>
<hr>
<dl>
<dt><strong>Name:</strong> <a name="Identify-GetType">H5Iget_type</a>
<dt><strong>Signature:</strong>
<dd><em>H5I_type_t</em> <code>H5Iget_type</code>(<em>hid_t</em> <code>obj_id</code>)
<dt><strong>Purpose:</strong>
<dd>Retrieves the type of an object.
<dt><strong>Description:</strong>
<dd><code>H5Iget_type</code> retrieves the type of the object
identified by <code>obj_id</code>.
<p>
Valid types returned by the function are
<table>
<tr><td width=200><code> H5I_FILE</code>
</td><td>File</td></tr>
<tr><td><code> H5I_GROUP</code>
</td><td>Group</td></tr>
<tr><td><code> H5I_DATATYPE</code>
</td><td>Datatype</td></tr>
<tr><td><code> H5I_DATASPACE</code>
</td><td>Dataspace</td></tr>
<tr><td><code> H5I_DATASET</code>
</td><td>Dataset</td></tr>
<tr><td><code> H5I_ATTR</code>
</td><td>Attribute</td></tr>
</table>
If no valid type can be determined or the identifier
submitted is invalid, the function returns
<table>
<tr><td width=200><code> H5I_BADID</code>
</td><td>Invalid identifier</td></tr>
</table>
<p>
This function is of particular value in determining the
type of object closing function (<code>H5Dclose</code>,
<code>H5Gclose</code>, etc.) to call after a call to
<code>H5Rdereference</code>.
<dt><strong>Parameters:</strong>
<dl>
<dt><em>hid_t</em> <code>obj_id</code>
<dd>IN: Object identifier whose type is to be determined.
</dl>
<dt><strong>Returns:</strong>
<dd>Returns the object type if successful;
otherwise <code>H5I_BADID</code>.
<dt><strong>Non-C API(s):</strong>
<dd><a href="fortran/h5i_FORTRAN.html#h5iget_type_f"
target="FortranWin"><img src="Graphics/FORTRAN.gif" border=0></a>
<!--
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<img src="Graphics/C++.gif">
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</dl>
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<center>
<table border=0 width=98%>
<tr><td valign=top align=left>
<a href="H5.intro.html">Introduction to HDF5</a> <br>
<a href="H5.user.html">HDF5 User Guide</a> <br>
<a href="index.html">Other HDF5 documents and links</a> <br>
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<td valign=top align=right>
And in this document, the
<a href="RM_H5Front.html">HDF5 Reference Manual</a>
<br>
<a href="RM_H5.html">H5</a>
<a href="RM_H5A.html">H5A</a>
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H5I
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<address>
<a href="mailto:hdfhelp@ncsa.uiuc.edu">HDF Help Desk</a>
<br>
Last modified: 14 July 2000
<br>
Describes HDF5 Release 1.5, Unreleased Development Branch
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