XML

XML (Extensible Markup Language) as defined by Wikipedia, the free online encyclopedia.

Books about XML

Websites

Cover Pages is a comprehensive, online reference collection supporting the XML family of markup language standards, XML vocabularies, and related structured information standards. Edited by Robin Cover since 1986, this public access knowledge base promotes and enables the use of open, interoperable, standards-based solutions which protect digital information and enhance the quality of data processing.

Best Software 4 Download, XML Template

W3 Schools XML Tutorial, examples of viewing, parsing, displaying and transforming data.

XSPF validator

XML.com, XML from the inside out