Date: Aug. 29, 2000
Link: http://www.perlmonth.com/columns/perl_xml/perl_xml.html?issue=5&id=941769562
Source Author or Organization: Eric Bohlman, PerlMonth

This is the second installment of a two part tutorial on parsing XML in Perl. It describes the function of Document Type Declarations (DTDs) and how to use them to enforce structure in your Perl XML parsing code, and gives a more detailed look at the Document Object Model (DOM) and tree-based parsing (including annotated sample code).