See also:

• Computers: Data Formats: Document: Hypermedia  (0)
• Computers: Data Formats: Open Standards  (32)
• Computers: Data Formats: Style Sheets  (211)
• Computers: Programming: Languages  (14,631)
• Reference: Knowledge Management: Information Overload: Hypertext  (8)
• Reference: Libraries: Library and Information Science: Technical Services: Cataloguing: Metadata  (597)

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Electronic Documents Markup - A brief explanation of what markup languages are and where they come from..

Microformats - Simple data formats built upon existing and widely adopted standards. Overview, specifications, events, and discussion..

Project Xanadu - The original hypertext project. Includes a history of the project and gives credit to the early developers of markup languages..

whatis.com: markup - A short definition..

YAML Ain't Markup Language (YAML) - A straightforward machine parsable data serialization format designed for human readability and interaction with scripting languages such as Perl and Python..