To an interested outsider the appearance of MacFarlane's name in the list gave this instant gravitas. As the builder of pandoc he has to have the widest, most d

To an interested outsider the appearance of MacFarlane's name in the list gave this instant gravitas. As the builder of pandoc he has to have the widest, most detailed knowledge of markup syntaxes of about anyone. Given that, the lack of a formal definition is even more surprising: why did they not spec it in Haskell? Formal, unambiguous, and as a side benefit, executable.