W3C XML
W3C XML
http://www.w3.org/xml/
XML.Com
Xml.com, where the xml community shares xml development resources and solutions, features timely news, opinions, features, and tutorials; the annotated xml specification created by tim bray; authoring tools, xml developer resources, interactive forums...
http://www.xml.com/
XML.org
XML.org
http://www.xml.org/