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<div id="preamble"><h1>Apache Module mod_cern_meta</h1>
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<table class="module"><tr><th><a href="module-dict.html#Description">Description:</a></th><td>CERN httpd metafile semantics</td></tr>
<tr><th><a href="module-dict.html#Status">Status:</a></th><td>Extension</td></tr>
<tr><th><a href="module-dict.html#ModuleIdentifier">Module&nbsp;Identifier:</a></th><td>cern_meta_module</td></tr>
<tr><th><a href="module-dict.html#SourceFile">Source&nbsp;File:</a></th><td>mod_cern_meta.c</td></tr></table>
<h3>Summary</h3>

    <p>Emulate the CERN HTTPD Meta file semantics. Meta files are HTTP
    headers that can be output in addition to the normal range of
    headers for each file accessed. They appear rather like the
    Apache .asis files, and are able to provide a crude way of
    influencing the Expires: header, as well as providing other
    curiosities. There are many ways to manage meta information,
    this one was chosen because there is already a large number of
    CERN users who can exploit this module.</p>

    <p>More information on the <a href="https://www.w3.org/Daemon/User/Config/General.html#MetaDir">CERN metafile semantics</a> is available.</p>
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<div id="quickview"><h3 class="directives">Directives</h3>
<ul id="toc">
<li><img alt="" src="../images/down.gif"> <a href="#metadir">MetaDir</a></li>
<li><img alt="" src="../images/down.gif"> <a href="#metafiles">MetaFiles</a></li>
<li><img alt="" src="../images/down.gif"> <a href="#metasuffix">MetaSuffix</a></li>
</ul>
<h3>Bugfix checklist</h3><ul class="seealso"><li><a href="https://www.apache.org/dist/httpd/CHANGES_2.4">httpd changelog</a></li><li><a href="https://bz.apache.org/bugzilla/buglist.cgi?bug_status=__open__&amp;list_id=144532&amp;product=Apache%20httpd-2&amp;query_format=specific&amp;order=changeddate%20DESC%2Cpriority%2Cbug_severity&amp;component=mod_cern_meta">Known issues</a></li><li><a href="https://bz.apache.org/bugzilla/enter_bug.cgi?product=Apache%20httpd-2&amp;component=mod_cern_meta">Report a bug</a></li></ul><h3>See also</h3>
<ul class="seealso">
<li><code class="module"><a href="../mod/mod_headers.html">mod_headers</a></code></li>
<li><code class="module"><a href="../mod/mod_asis.html">mod_asis</a></code></li>
</ul></div>

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<div class="directive-section"><h2 id="metadir"><span id="MetaDir">MetaDir</span> Directive <a title="Permanent link" href="#metadir" class="permalink">&para;</a></h2>
<table class="directive">
<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Name of the directory to find CERN-style meta information
files</td></tr>
<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>MetaDir <var>directory</var></code></td></tr>
<tr><th><a href="directive-dict.html#Default">Default:</a></th><td><code>MetaDir .web</code></td></tr>
<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config, virtual host, directory, .htaccess</td></tr>
<tr><th><a href="directive-dict.html#Override">Override:</a></th><td>Indexes</td></tr>
<tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Extension</td></tr>
<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_cern_meta</td></tr>
</table>
    <p>Specifies the name of the directory in which Apache can find
    meta information files. The directory is usually a 'hidden'
    subdirectory of the directory that contains the file being
    accessed. Set to "<code>.</code>" to look in the same directory
    as the file:</p>

    <pre class="prettyprint lang-config">MetaDir .</pre>


    <p>Or, to set it to a subdirectory of the directory containing the
    files:</p>

    <pre class="prettyprint lang-config">MetaDir .meta</pre>


</div>
<div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif"></a></div>
<div class="directive-section"><h2 id="metafiles"><span id="MetaFiles">MetaFiles</span> Directive <a title="Permanent link" href="#metafiles" class="permalink">&para;</a></h2>
<table class="directive">
<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Activates CERN meta-file processing</td></tr>
<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>MetaFiles on|off</code></td></tr>
<tr><th><a href="directive-dict.html#Default">Default:</a></th><td><code>MetaFiles off</code></td></tr>
<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config, virtual host, directory, .htaccess</td></tr>
<tr><th><a href="directive-dict.html#Override">Override:</a></th><td>Indexes</td></tr>
<tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Extension</td></tr>
<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_cern_meta</td></tr>
</table>
    <p>Turns on/off Meta file processing on a per-directory basis.</p>

</div>
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<div class="directive-section"><h2 id="metasuffix"><span id="MetaSuffix">MetaSuffix</span> Directive <a title="Permanent link" href="#metasuffix" class="permalink">&para;</a></h2>
<table class="directive">
<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>File name suffix for the file containing CERN-style
meta information</td></tr>
<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>MetaSuffix <var>suffix</var></code></td></tr>
<tr><th><a href="directive-dict.html#Default">Default:</a></th><td><code>MetaSuffix .meta</code></td></tr>
<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config, virtual host, directory, .htaccess</td></tr>
<tr><th><a href="directive-dict.html#Override">Override:</a></th><td>Indexes</td></tr>
<tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Extension</td></tr>
<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_cern_meta</td></tr>
</table>
    <p>Specifies the file name suffix for the file containing the
    meta information. For example, the default values for the two
    directives will cause a request to
    <code>DOCUMENT_ROOT/somedir/index.html</code> to look in
    <code>DOCUMENT_ROOT/somedir/.web/index.html.meta</code> and
    will use its contents to generate additional MIME header
    information.</p>

    <div class="example"><h3>Example:</h3><pre class="prettyprint lang-config">MetaSuffix .meta</pre>
</div>

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