XHTML
A reformulation of HTML 4.01 in XML. Being XML means that XHTML can be viewed, edited, and validated with standard XML tools. At the same time, it operates as well as or better than HTML 4 in existing HTML 4 conforming user agents; Extensible Hypertext Markup Language
XHTML is an offshoot of HTML.
xhtml
An inferior form of html that restricts many freedoms that html offers.
xhtml is actualy the cyber version of communism.