jQuery and XML Revisited
http://blog.reindel.com/2007/09/24/jquery-and-xml-revisited/

Reindel, Brian
d'bug
2008

Abstract:

In releasing jQuery v.1.2, a decision was made by the development team to drop XPath support from the core. Instead, an officially released XPath jQuery plugin is now available, which provides deprecated functionality. Although initially disappointed by this decision, I was happy to discover that alternative methods for obtaining data from an XML file are still available without the plugin.