Perl module to add XPath support to HTML::TreeBuilder

 HTML::TreeBuilder::XPath is a drop-in replacement for HTML::TreeBuilder (see
 libhtml-treebuilder-perl) that adds typical XPath methods, making it easy to
 query a document and extract information about nodes and values.
 .
 It is also capable of generating two representations of the XML output: a
 compact version, intended for machine readable output and minimal space
 requirements (in terms of disk space and network bandwidth); and a human
 readable, indented version.