Available Perl XML Modules
XML::Parser is the ultimate ancestor and cornerstone of XML processing in Perl. Nearly all of the modules that read XML use it. It was developed initially by Larry Wall, and is now maintained by Clark Cooper. XML::Parser in turn is based on the expat non-validating parser written by James Clark.
XML::Parser can parse one or more XML documents. As it is based on a non-validating parser, it only checks for the document well-formedness, and does not fill in implied attributes. A user-defined handler can be called on each event encountered by the parser, allowing processing of the document.
It is built on top of XML::Parser::Expat, which is a lower level interface to James Clark's expat library.