Is there any design document for the FPTOOLS libraries or some description of language features that are (allowed to be) used in them? I am going to be taking some significant time off from my normal jobs in the upcoming months. During part of that time, I would like to do some work to improve the Haskell toolchain. This involves creating or improving tools that parse and analyze Haskell code. My goal is to have these tools support enough of Haskell to be able to handle at least the most important libraries used by Haskell programmers. In particular, this includes all or most of the libraries in FPTOOLS. Plus, I want these tools to operate on Darcs as it is an obvious poster-child for Haskell. Thus, I need to support Haskell 98 plus all the extensions being used in Darcs and FPTOOLS as of approx. March, 2007 (as I intened to start working again at that time). It would be very nice if there was some document that described "Haskell 98 plus all the extensions being used in Darcs and FPTOOLS as of March, 2007." Besides being useful to me, it would be a useful guide for potential contributors to FPTOOLS. Regards, Brian