Description language may refer generally a kind of language which is used to describe an interface to another. In computer terms, a description language may be confused with or less formally referred to by other terms such as API, interface language, specification language, or middleware.

• User interface markup language - XML, XAML, LZX. (See also Web interface languages)
• Interface description language aka interface definition language (IDL)
  • Regular Language description for XML (RELAX)
  • Web Services Description Language (WSDL)
  • Page description language (PDL)
• Binary Format Description language - extension of XSIL
• Hardware description language - for circuits
  • VHSIC hardware description language - for Field-programmable gate arrays, and logic circuits
• Job Submission Description Language
• Architecture Description Language
• Specification and Description Language - a specification language
• Character Description Language - for CJK fonts
• IDL specification language
• A Descriptive Vocabulary of the Language of the Aborigines

See also DDL and SDL.

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