Some people have requested my slides from the short talk I gave about monoids and monoidal parsing at Hac Phi. So, here they are.
There will be more to come at the next Boston Haskell User Group in August, where it looks like I'll be giving two short talks covering monoids. I may use the monoidal parsing engine from Kata as an example for the advanced talk if I have time and will start to cover parsing larger classes of grammars in general (regular languages, CFGs/TIGs, TAGs, PEGs, LALR, attribute-grammars, etc.)