The Extensible Markup Language (XML) is being developed
as an extremely simple dialect of
SGML to enable generic SGML to be
served, received, and processed on the Web in a way that is now possible
with HTML.
W3C activity statement for SGML, XML, and Structured Document Interchange. It is one of the
Architecture Domain activities.
<URL:http://www.w3.org/XML/Activity>