Dear [Reader]: Recently, I needed to solve a constraint satisfaction problem. So I coded a solution using backtracking and tabu lists. I was pleased to see how easy it is in Haskell. As an exercise, I created a module and a class interface for the search algorithm. That was also a pleasure. Since, I've become interested in this area I thought I might try to create a library that presents a nice interface for various popular metaheuristics. I have poked around in Hackage, but not found anything similar. Is such a thing already available? I am thinking of something that would be immediately useful in Haskell programs without needing to learn another language like CLP. BTW, the problem I am working on is an automated approach to lifting pieces of Renaissance polyphony from 3-limit to 5-limit Just Intonation. Cheers, David ___________________ (---o-------o-o-o---o-o-o----( David F. Place mailto:d@vidplace.com