- 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.
- 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.
