virtual void evaluate(XalanDOMString &buf, XalanNode *contextNode, const PrefixResolver &prefixResolver, XPathExecutionContext &executionContext) const =0
Append the value to the buffer.
virtual void evaluate(XalanDOMString &buf, const PrefixResolver &prefixResolver, XPathExecutionContext &executionContext) const =0
Append the value to the buffer.