Every now and then I think about contributing some comment to a Wikipedia aritcle. But when you start investigating how to do this, you are faced with learning what looks like some kind of mark-up language. For example, if you want to add a comment to the discussion of an article, it looks like you have to edit the source code of the discussion page. Does anyone know if the Wikipedia's methods are an implementation of some standard language? It might be worth learning if it was. I can't see investing the time otherwise.