Hi.

A good place to start would be O'Reilly's new book:

Title: Perl & XML
ISBN: 0-596-00205-X
Price: $34.95 US

More info on this title can be found here:

http://www.oreilly.com/catalog/perlxml/

As far as modules are concerned, I would suggest exploring:

• XML::Generator
• XML::Simple
• XML::Twig
• XML::TokeParser
• XML::Writer

These are all available on the ActiveState repository as well.
Hope this helps,

-Katie.