In addition to the modules suggested by Masem, you might want to check out mirod's XML::Twig module which is well documented at http://www.xmltwig.com, Matt Sargent's XML::XPath and the new XML::LibXML module. One to stay away from (IMHO) is XML::DOM which is slow, awkward to use, and doesn't seem to be actively maintained anymore. You also may want to check out the archives of the Perl-XML lists at http://aspn.activestate.com/ASPN/Mail/Browse/Threaded/perl-xml, Kip Hampton's articles on Perl and XML at http://www.xml.com, and the Reviews section here at the monestary. If you are interested in Perl-XML application servers, check out these nodes.

The articles at xml.com may be of particular interest to you as they recently ran a series of intro articles on the perl xml modules.

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Coyote