A community website now aims to "document various tools and resources available to document authors and developers, as well as implementors of the various Markdown implementations".
Standardization CommonMarkįrom 2012, a group of people, including Jeff Atwood and John MacFarlane, launched what Atwood characterised as a standardisation effort. Gruber avoided using curly braces in Markdown to unofficially reserve them for implementation-specific extensions. However, Gruber has argued that complete standardization would be a mistake: "Different sites (and people) have different needs. These issues spurred the creation of tools such as Babelmark to compare the output of various implementations, and an effort by some developers of Markdown parsers for standardisation. The behavior of some of these diverged from the reference implementation, as Markdown was only characterised by an informal specification and a Perl implementation for conversion to HTML.Īt the same time, a number of ambiguities in the informal specification had attracted attention. Rise and divergence Īs Markdown's popularity grew rapidly, many Markdown implementations appeared, driven mostly by the need for additional features such as tables, footnotes, definition lists, and Markdown inside HTML blocks. It can take the role of a standalone script, a plugin for Blosxom or a Movable Type, or of a text filter for BBEdit. Gruber wrote a Perl script,, which converts marked-up text input to valid, well-formed XHTML or HTML and replaces angle brackets ( ) and ampersands ( &) with their corresponding character entity references.
Its key design goal was readability, that the language be readable as-is, without looking like it has been marked up with tags or formatting instructions, unlike text formatted with ‘heavier’ markup languages, such as Rich Text Format (RTF), HTML, or even wikitext (each of which have obvious in-line tags and formatting instructions which can make the text more difficult for humans to read). Swartz and Gruber then worked together to create the Markdown language in 2004, with the goal of enabling people "to write using an easy-to-read and easy-to-write plain text format, optionally convert it to structurally valid XHTML (or HTML)." In 2002 Aaron Swartz created atx and referred to it as “the true structured text format”. Markdown was inspired by pre-existing conventions for marking up plain text in email and usenet posts, such as the earlier markup languages setext (c.
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