* @param text the expression to be evaluated
* @param namespaces the namespace prefix and URIs to use
* @return the builder to continue processing the DSL
*/
public T vtdxml(String text, Map<String, String> namespaces) {
VtdXmlExpression expression = new VtdXmlExpression(text);
expression.setNamespaces(namespaces);
setExpressionType(expression);
return result;
}