The abstract interface (API) of the Edison library for Haskell for use with ghc 6. . Edison is a library of purely function data structures for Haskell originally written by Chris Okasaki. Conceptually, it consists of two things: - A set of type classes defining data the following data structure abstractions: 'sequences', 'collections' and 'associative collections' - Multiple concrete implementations of each of the abstractions . This package contains the set of type classes. . Homepage: http://www.eecs.tufts.edu/~rdocki01/edison.html