Cast (R)Markdown Files to XML and Back Again
Parsing (R)Markdown files with numerous regular expressions can be fraught with peril, but it does not have to be this way. Converting (R)Markdown files to XML using the commonmark package allows in-memory editing via of markdown elements via XPath through the extensible R6 class called yarn. These modified XML representations can be written to (R)Markdown documents via an xslt stylesheet which implements an extended version of GitHub-flavoured markdown so that you can tinker to your hearts content.