IBM developerWorks have published part 2 of their XML for Perl developers series (which I previously mentioned), titled Advanced XML parsing techniques using Perl:

"This series is a guide to those who need a quick XML-and-Perl solution. Part 1 looked at XML::Simple, a tool to integrate XML into a Perl application. This second article in the series introduces the Perl programmer to the two major schools of XML parsing: tree parsing and event-driven parsing."

This may be of interest to some.

Martin