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Short for Extensible HyperText Markup Language, a hybrid between HTML and XML specifically designed for Net device displays.

XHTML is a markup language written in XML; therefore, it is an XML application.

XHTML uses three XML namespaces (used to qualify element and attributes names by associating them with namespaces identified by URI references. Namespaces prevent identically custom-named tags that may be used in different XML documents from being read the same way), which correspond to three XHTML 1.0 DTDs: Strict, Transitional, and Frameset.

XHTML markup must conform to the markup standards defined in the DTD.

XHTML is a reformulation of HTML 4.01 in XML, and can be put to immediate use with existing browsers by following a few simple guidelines. To prepare for the future, this web site has been completely written in XHTML 1.0.

A click on this symbol: Valid XHTML 1.0! validates the XHTML part of this page.

A click on this symbol: Valid CSS! validates the CSS part of this page.