/code>.<DT><B>Throws:</B><DD><A HREF="../../../../javax/xml/xpath/XPathExpressionException.html">XPathExpressionException</A> - If the expression cannot be evaluated.<DD>java.lang.IllegalArgumentException - If <code>returnType</code> is not one
 of the types defined in <A HREF="../../../../javax/xml/xpath/XPathConstants.html"><CODE>XPathConstants</CODE></A>.<DD>java.lang.NullPointerException - If  <code>returnType</code> is
 <code>null</code>.</DL>
</DD>
</DL>
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