A reformulation of HTML 4 in
XML 1.0:
three DTDs are provided -
Strict, Transitional, Frameset
Compatibility with existing HTML user agents is possible by
following a small set of guidelines described in
Appendix C
XHTML 1.0 became
a Recommendation on 26 January 2000, the Second
Edition will become a Recommendation soon
But XHTML 1.0 is only a part of the XHTML Family