ef="http://www.w3.org/TR/xmlschema-2/#gMonthDay" class="offsite"><code>xs:gMonthDay</code></a> (<code>--<var>MM</var>-<var>DD</var></code>)
         </li><li><a href="http://www.w3.org/TR/xmlschema-2/#gDay" class="offsite"><code>xs:gDay</code></a> (<code>---<var>DD</var></code>)
         </li></ul><p>
         If the date/time string is not in one of these formats, then <code>NaN</code> is returned.
      </p></div><h2>Implementations</h2><p>
                  The following XSLT processors support <code>dat