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Plain text markup language / From Wikipedia, the free encyclopedia

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Markdown[11] is a lightweight markup language for creating formatted text using a plain-text editor. John Gruber and Aaron Swartz[3][4] created Markdown in 2004 as a markup language that is intended to be easy to read in its source code form.[11] Markdown is widely used for blogging and instant messaging, and also used elsewhere in online forums, collaborative software, documentation pages, and readme files.

Quick facts: Filename extensions, Internet media type...
Filename extensions
.md, .markdown[1][2]
Internet media typetext/markdown[2]
Uniform Type Identifier (UTI)net.daringfireball.markdown
Developed by
Initial releaseMarch 9, 2004 (19 years ago) (2004-03-09)[5][6]
Latest release
December 17, 2004 (19 years ago) (2004-12-17)[7]
Type of formatOpen file format[8]
Extended topandoc, MultiMarkdown, Markdown Extra, CommonMark,[9] RMarkdown[10]

The initial description of Markdown[12] contained ambiguities and raised unanswered questions, causing implementations to both intentionally and accidentally diverge from the original version. This was addressed in 2014 when long-standing Markdown contributors released CommonMark, an unambiguous specification and test suite for Markdown.[13]

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