The CommonMark specification defines a rationalized version of
markdown syntax. This package uses the 'cmark' reference
implementation for converting markdown text into various formats
including html, latex and groff man. In addition it exposes the
markdown parse tree in xml format. Also includes opt-in support for
GFM extensions including tables, autolinks, and strikethrough text.

Homepage:
https://CRAN.R-project.org/package=commonmark
