I briefly discuss XML::XPath at the XML::Generator::DBI Tutorial. I use it in the second example to set up how XPath itself (not the module) can be used in XSLT documents to 'drill down' to the nodes or paths in question.

jeffa

L-LL-L--L-LL-L--L-LL-L--
-R--R-RR-R--R-RR-R--R-RR
B--B--B--B--B--B--B--B--
H---H---H---H---H---H---
(the triplet paradiddle with high-hat)