Alternations, monotonicty and the lexicon: an application to factorising information in a Tree Adjoining Grammar
Abstract
For reasons of maintenance, economy and consistency, devising ways of factorising the information contained in a grammar is particularly important. This paper proposes a factorising system for TAG (Tree Adjoining Grammar) which uses Beth Levin's alternations and thereby remains monotonic. It explains why monotonicity is an important characteristic of such a system and compares the proposed approach to existing, related proposals.