Standard Generalized Markup Language Hear it!

Standard Generalized Markup Language (SGML) Telecom Definition
A language used by Web developers and designers for creating declarative markup languages like Hypertext Markup Language (HTML). Extensible Markup Language (XML) is a condensed form of SGML that is published and maintained by the World Wide Web Consortium (W3C). See HTML, W3C, WWW, and XML.