xforms

                MIME-headers, C variables of the Apache HTTP Server or

                <code>struct tm</code> fields of the Unix system.

                Most are documented elsewhere in the Manual or in

                the CGI specification. Those that are special to

                mod_rewrite include those below.</p>

                the CGI specification.</p>

                <p>SERVER_NAME and SERVER_PORT depend on the values of 

                <code class="directive"><a href="../mod/core.html#usecanonicalname">UseCanonicalName</a></code> and

                <code class="directive"><a href="../mod/core.html#usecanonicalphysicalport">UseCanonicalPhysicalPort</a></code>

                respectively.</p>

                <p>Those that are special to mod_rewrite include those below.</p>

        <div class="note">

                <dl>

                  <dt><code>IS_SUBREQ</code></dt>

      <p><a id="patterns" name="patterns"><em>Pattern</em></a> is

      a perl compatible <a id="regexp" name="regexp">regular

      expression</a>. On the first RewriteRule it is applied to the (%-encoded)

      expression</a>. On the first RewriteRule it is applied to the (%-decoded)

      <a href="./directive-dict.html#Syntax">URL-path</a> of the request;

      subsequent patterns are applied to the output of the last matched

      RewriteRule.</p>