Links of Interest

XML Core Technologies
Extensible Markup Language (XML) The official W3C specifications for XML and related documents
Document Object Model (DOM) The W3C's API for accessing and manipulating XML and HTML documents
Simple API for XML (SAX) The API for event-based XML document processing
Style Sheets(CSS and XSL) For XML formatting and presentation
XML Information Sources
SGML and XML news Daily updates give the most comprehensive cover of the XML industry
XMLInfo An extensive selection of XML information sources
Cafe con Leche XML News and resources updated almost daily.
XML.COM A joint project of O'Reilly and Associates and Seybold
The SGML/XML Web Page Comprehensive list of XML resources, software, documentation and standards
Schema.net A directory of XML schemas and schema tools
XML Software Resources
XMLSoftware.com The center for XML software and development tools