Ranged sets library

 This package provides a library for the Haskell programming language.
 See http://www.haskell.org/ for more information on Haskell.
 .
 A ranged set is an ordered list of ranges. This allows sets such as all
 reals x such that:
 .
 (0.25 < x <= 0.75 or 1.4 <= x < 2.3 or 4.5 < x)
 .
 Alternatively you can have all strings s such that:
 .
     ("F" <= s < "G")