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<title>Definitions of terms used to describe Apache
modules</title>
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<h1 align="CENTER">Terms Used to Describe Apache Modules</h1>
<p>Each Apache module is described using a common format that
looks like this:</p>
<dl>
<dd><a href="#Status" rel="Help"><strong>Status:</strong></a>
<em>status</em><br />
<a href="#SourceFile" rel="Help"><strong>Source
File:</strong></a> <em>source-file</em><br />
<a href="#ModuleIdentifier" rel="Help"><strong>Module
Identifier:</strong></a> <em>module-identifier</em><br />
<a href="#Compatibility"
rel="Help"><strong>Compatibility:</strong></a>
<em>compatibility notes</em></dd>
</dl>
<p>Each of the attributes, complete with values where possible,
are described in this document.</p>
<h2>Module Terms</h2>
<ul>
<li><a href="#Status">Status</a></li>
<li><a href="#SourceFile">Source File</a></li>
<li><a href="#ModuleIdentifier">Module Identifier</a></li>
<li><a href="#Compatibility">Compatibility</a></li>
</ul>
<hr />
<h2><a id="Status" name="Status">Status</a></h2>
<p>This indicates how tightly bound into the Apache Web server
the module is; in other words, you may need to recompile the
server in order to gain access to the module and its
functionality. Possible values for this attribute are:</p>
<dl>
<dt><strong>MPM</strong></dt>
<dd>A module with status "MPM" is a <a
href="../mpm.html">Multi-Processing Module</a>. Unlike the
other types of modules, Apache must have one and only one MPM
in use at any time. This type of module is responsible for
basic request handling and dispatching.</dd>
<dt><strong>Base</strong></dt>
<dd>A module labeled as having "Base" status is compiled and
loaded into the server by default, and is therefore normally
available unless you have taken steps to remove the module
from your configuration.</dd>
<dt><strong>Extension</strong></dt>
<dd>A module with "Extension" status is not normally compiled
and loaded into the server. To enable the module and its
functionality, you may need to change the server build
configuration files and re-compile Apache.</dd>
<dt><strong>Experimental</strong></dt>
<dd>"Experimental" status indicates that the module is
available as part of the Apache kit, but you are on your own
if you try to use it. The module is being documented for
completeness, and is not necessarily supported.</dd>
<dt><strong>External</strong></dt>
<dd>Modules which are not included with the base Apache
distribution ("third-party modules") may use the "External"
status. We are not responsible for, nor do we support such
modules.</dd>
</dl>
<hr />
<h2><a id="SourceFile" name="SourceFile">Source File</a></h2>
<p>This quite simply lists the name of the source file which
contains the code for the module. This is also the name used by
the <a
href="core.html#ifmodule"><code><IfModule></code></a>
directive.</p>
<hr />
<h2><a id="ModuleIdentifier" name="ModuleIdentifier">Module
Identifier</a></h2>
<p>This is a string which identifies the module for use in the
<a href="mod_so.html#loadmodule">LoadModule</a> directive when
dynamically loading modules. In particular, it is the name of
the external variable of type module in the source file.</p>
<hr />
<h2><a id="Compatibility"
name="Compatibility">Compatibility</a></h2>
<p>If the module was not part of the original Apache version 2
distribution, the version in which it was introduced should be
listed here.</p>
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