Extensible Markup Language

simplest version of the SGML standard for creating and designing HTML documents (suitable for use on Internet sites), XML

The Extensible Markup Language (XML) is a general-purpose markup language. It is classified as an extensible language because it allows its users to define their own tags. Its primary purpose is to facilitate the sharing of structured data across different information systems, particularly via the Internet. It is used both to encode documents and serialize data. In the latter context, it is comparable with other text-based serialization languages such as JSON and YAML.
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<language, text> (XML) An initiative from the W3C defining an "extremely simple" dialect of SGML suitable for use on the World-Wide Web.
http://www.w3.org/XML/.
[Relationship to the XSL forthcoming subset of DSSSL?]
(1997-11-20)