A shell for grammar development by Jo Calder , Kevin Humphreys GSci.ed.ac.uk>, Chris Brew , and Mike Reape . It handles various grammatical formalisms and requires SICStus Prolog version 2.1#6 or later. Current version: 1.0, as of 1993-06-18. . E-mail: GSci.ed.ac.uk>. (2000-07-22)