This implements the DOM Level 3 XPath W3C Working Draft 08 February 2002. API SUBJECT
TO CHANGE!
The GdomeXPathResult interface represents the result of the evaluation of an XPath
expression within the context of a particular node. Since evaluation of an XPath
expression can result in various result types, this object
makes it possible to discover and manipulate the type and value of the result.
The value of this single node result, which may be NULL. This result is not
guaranteed to be the first node in document order where the expression
evaluates to multiple nodes.