From Seo Wiki - Search Engine Optimization and Programming Languages
A number of lightweight markup languages extend Markdown by implementing added features (such as tables, footnotes, inline HTML, Markdown inside HTML blocks) not available with plain Markdown syntax. In some cases, this is in order to enable conversion into more formats than HTML, for example, LaTeX, RTF, DocBook.
Among these are Markdown Extra, MultiMarkdown, Maruku and the Pandoc Markdown extension.
- PHP Markdown Extra official Markdown Extra site, featuring PHP implementation and syntax reference.
- Maruku is a Ruby implementation of Markdown and Markdown Extra.
- MultiMarkdown is an implementation of Markdown oriented toward writing, which includes various extensions, including footnotes and RTF and LaTeX output.
- Pandoc is a Haskell implementation of Markdown with numerous extensions and additional output formats, including reStructuredText, HTML, LaTeX, ConTeXt, PDF, RTF, DocBook XML, OpenDocument XML, ODT, GNU Texinfo, MediaWiki (Wikipedia) markup, groff man pages and S5 slideshows. The underlying parser reads not only Markdown, but also reStructuredText and subsets of HTML, and LaTeX.
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