Published January 2000, revised 1 August 2002
W3C's first Recommendation for XHTML, following on from earlier work on HTML 4.01, HTML 4.0, HTML 3.2 and HTML 2.0.
Is a reformulation of HTML 4.01 in XML, and combines the strength of HTML 4 with the power of XML.
Relies on HTML 4.01 for the meanings of XHTML elements and attributes.