Or {{{ }}} as used by Creole. Unlike Org-mode, which despite the OP's claims is not at all standardized, Creole is an actually standardized [1] (but probably st

Or {{{ }}} as used by Creole. Unlike Org-mode, which despite the OP's claims is not at all standardized, Creole is an actually standardized [1] (but probably still under-specified) lightweight markup language. As shown on the Wikipedia page [2] it has pretty much all the other mentioned advantages. Another important advantage of using block syntax is that it offers a natural uniform extension mechanism, potentially even with auto-completion for improved discoverability. For example Trac uses this for source code highlighting and plugins.[3] [1] http://www.wikicreole.org/wiki/Creole1.0 http://www.wikicreole.org/wiki/Creole1.0 [2] https://en.wikipedia.org/wiki/Creole_(markup) https://en.wikipedia.org/wiki/Creole_(markup) [3] https://i.imgur.com/zbkU670.gif https://i.imgur.com/zbkU670.gif