link to XML

XML

XML stands for Extensible Markup Language, a family of standards for the exchange of structured information that was developed by the World Wide Web Consortium (W3C).

link to XHTML

XHTML

XHTML stands for Extensible Hypertext Markup Language, a proposed version of Hypertext Markup Language (HTML) from the World Wide Web Consortium (W3C).

link to X.500

X.500

X.500 is a recommendation from the International Telecommunication Union (ITU) that specifies a global, hierarchical directory service.