This is an XML namespace defined in the XHTML™ 1.0: The Extensible HyperText Markup Language specification, and is shared across XHTML Family document types using XHTML Modularization, including XHTML 1.1 and XHTML Basic.
The XHTML specifications are developed by the W3C HTML Working Group (members only), as part of the W3C HTML Activity.
For more information about XML, please refer to the Extensible Markup Language (XML) 1.0 specification. For more information about XML namespaces, please refer to the Namespaces in XML specification.
Last modified: $Date: 2003/04/11 14:00:50 $