ular Expression Details">Section 9.7.3.1</a> for details of
       <span class="productname">PostgreSQL</span>'s regular expression syntax.)
      </p><p>
       A separate file containing database names and/or regular expressions
       can be specified by preceding the file name with <code class="literal">@</code>.
      </p></dd><dt><span class="term"><em class="replaceable"><code>user</code></em></span></dt><dd><p>
       Specifies which database user name(s) this record
       matches. The value <code