Some people have requested my slides from the short talk I gave about monoids and monoidal parsing at Hac Phi. So, here they are.

-   [Hac Phi Slides (Powerpoint 2007)](http://comonad.com/reader/wp-content/uploads/2009/07/AllAboutMonoids.pptx)
-   [Hac Phi Slides (PDF)](http://comonad.com/reader/wp-content/uploads/2009/07/AllAboutMonoids.pdf)

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.)