[Haskell] FP-style vs. OO-style AST structure

Hi, I'm a Haskell newbie, but not new to programming, and I have a question regarding style (I think). I'm writing a parser for OMG's OCL, and have two ways of defining the AST model of a constraint. Each constraint in OCL has the following 4 characteristics: 1. name :: Maybe String 2. context

[Haskell] 2nd CFP: Workshop on Generic Programming 2006

[The deadline is approaching: 24 days left.] SECOND CALL FOR PAPERS Workshop on Generic Programming 2006 Portland, Oregon, 16th September 2006