Clarifies (I hope) what RewriteRule patterns are matched against. See

      <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 matched against

      the (%-decoded) <a href="./directive-dict.html#Syntax">URL-path</a> (or 

      <a href="./directive-dict.html#Syntax">file-path</a>, depending 

      on the context) of the request. Subsequent patterns are matched against the 

      output of the last matching RewriteRule.</p>

      the (%-decoded) <a href="directive-dict.html#Syntax">URL-path</a>

      of the request, or, in per-directory context (see below), the URL

      path relative to that per-directory context. Subsequent patterns

      are matched against the output of the last matching RewriteRule.</p>

<note><title><a id="what_is_matched" name="what_is_matched">What is matched?</a></title>

      <p>In <directive module="core">VirtualHost</directive> context,