![]() ![]() 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). Gruber and Swartz created 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. This was addressed in 2014 when long-standing Markdown contributors released CommonMark, an unambiguous specification and test suite for Markdown. The initial description of Markdown contained ambiguities and raised unanswered questions, causing implementations to both intentionally and accidentally diverge from the original version. Markdown is widely used for blogging and instant messaging, and also used elsewhere in online forums, collaborative software, documentation pages, and readme files. John Gruber and Aaron Swartz created Markdown in 2004 as a markup language that is intended to be easy to read in its source code form. Markdown is a lightweight markup language for creating formatted text using a plain-text editor. For compatibility, you should also add a pipe on either end of the row.Pandoc, MultiMarkdown, Markdown Extra, CommonMark, RMarkdown ĭaringfireball. To add a table, use three or more hyphens ( -) to create each column’s header, and use pipes ( |) to separate each column. Check your processor’s documentation for more information. Many of them allow you to add extensions that enable extended syntax elements. There are dozens of Markdown processors available. Many of the most popular Markdown applications use one of the following lightweight markup languages: They include basic syntax and build upon it by adding additional elements like tables, code blocks, syntax highlighting, URL auto-linking, and footnotes. There are several lightweight markup languages that are supersets of Markdown. If it doesn’t, it may still be possible to enable extensions in your Markdown processor. ![]() ![]() You’ll need to check whether or not the lightweight markup language your application is using supports the extended syntax elements you want to use. Not all Markdown applications support extended syntax elements. These elements can be enabled by using a lightweight markup language that builds upon the basic Markdown syntax, or by adding an extension to a compatible Markdown processor. Several individuals and organizations took it upon themselves to extend the basic syntax by adding additional elements like tables, code blocks, syntax highlighting, URL auto-linking, and footnotes. The basic syntax outlined in the original Markdown design document added many of the elements needed on a day-to-day basis, but it wasn’t enough for some people. ![]()
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