http://www.xml.org
http://www.sun.com/software/xml/faqs.html#2
http://www.w3.org/XML/1999/XML-in-10-points
http://www.xml.com/pub/a/2001/11/14/xml-libxml.html
http://gnosis.cx/publish/programming/xml_models_sax.html
http://www.w3.org/TR/xlink/
http://www.w3.org/DOM/
http://www.xml.com/pub/a/2000/04/05/feature/index.html
http://www.xml.com “ Kip Hampton and Michael Rodriguez articles
http://www.xml.com/lpt/a/2001/11/14/xml-libxml.html
http://www.xml.com/pub/a/2002/04/17/perl-xml.html “ XPath