nput parameters (<code class="literal">$1</code>, <code class="literal">$2</code>, etc.)
     </p></dd><dt><span class="term"><code class="literal">Oid * <em class="parameter"><code>argtypes</code></em></code></span></dt><dd><p>
      an array of length <em class="parameter"><code>nargs</code></em>, containing the
      <acronym class="acronym">OID</acronym>s of the data types of the parameters
     </p></dd><dt><span class="term"><code class="literal">Datum * <em class="parameter"><code>values</code></em><