General-purpose markup language
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A general-purpose markup language is a markup language that is used for more than one purpose or situation. Other, more specialized domain-specific markup languages are often based upon these languages. For example, HTML 4.1 and earlier are domain-specific markup languages (for webpages), and are based on the syntax of SGML, which is a general-purpose markup language.
Notable general-purpose markup languages include:
- ASN.1 (Abstract Syntax Notation One)
- GML - the predecessor of SGML
- SGML - a predecessor of XML