<P> Transitional DTD allows some older PUBLIC and attributes that have been deprecated: </P> <P> If frames are used, the Frameset DTD must be used instead, like this: </P> <P> XHTML's DTDs are also Strict, Transitional and Frameset . </P> <P> XHTML Strict DTD . No deprecated tags are supported and the code must be written correctly according to XML Specification . </P>

How many different type of doctype are defined in html5