Origin of SGMLS(tandard) G(eneralized) M(arkup) L(anguage).
sgml - Computer Definition
A metalanguage used to describe markup languages, such as Hypertext Markup Language (HTML). SGML can be used to describe the structure and elements of a document and the tags that will be used to display those elements in a document. SGML supports the creation of documents that are platform- and application-independent and that, therefore, retain their information formatting, indexing, and linkages. SGML is standardized by the International Organization for Standardization (ISO) as ISO 8879:1986. The Extensible Markup Language (XML) is essentially a condensed version of SGML. See also XML.
(Standard Generalized Markup Language) An ISO standard for defining the format in a text document. Widely used in the publishing industry, an SGML document uses a separate Document Type Definition (DTD) file that defines the format codes, or tags, embedded within it. Since SGML describes its own formatting, it is known as a "meta-language." SGML is a very comprehensive language that also includes hypertext links. HTML is an SGML document that uses a fixed set of tags, while XML is a simplified version of SGML. See HTML, XML and DSSSL.