A></PRE>
<DL>
<DD>Execute the function.  The function must return
 a valid object.<DD><DL>
<DT><B>Parameters:</B><DD><CODE>xctxt</CODE> - The current execution context.<DT><B>Returns:</B><DD>A valid XObject.<DT><B>Throws:</B><DD><A HREF="../../../../javax/xml/transform/TransformerException.html">TransformerException</A> - &nbsp;<DT><B>Overrides:</B><DD><A HREF="../../../../org/apache/xpath/functions/Function.html#execute(org.apache.xpath.XPathContext)">execute</A> in class <A HREF="../../../../org/apache/xp