The uulib Haskell library contains fast, error repairing parser combinators (UU.Parsing), pretty print combinators (UU.Pretty) and a set of data structures and algorithms for working with sets and sequences (UU.DData) for Haskell. . The library is developed at Utrecht University and is part of the Haskell Utrecht Tools. . This package contains additional profiling libraries which can be used with ghcprof.