July 1, 2008
Refine XPath results using predicate matching
Author: JT Smith
Predicates give you advanced and refined searching capabilities, allowing you to evaluate the values of attributes and the parent and child nodes of a targeted element. Rather than find a wider node set and refine or filter that set programmatically, you can add predicates to your XPaths to find exactly the nodes you want.
Link: IBM developerWorks