Paper: Coordination In Unification-Based Grammars

ACL ID E91-1029
Title Coordination In Unification-Based Grammars
Venue Annual Meeting of The European Chapter of The Association of Computational Linguistics
Session Main Conference
Year 1991

Within unification-based grammar formalisms, providing a treatment of cross-categorial coor- dination is problematic, and most current solu- tions either over-generate or under-generate. In this paper we consider an approach to coordi- nation involving "composite" feature structures, which describe coordinate phrases, and present the augmentation to the logic of feature struc- tures required to admit such feature structures. This augmentation involves the addition of two connectives, composite conjunction and compos- ite disjunction, which interact to allow cross- categorial coordination data to be captured ex- actly. The connectives are initially considered to function only in the domain of atomic values, be- fore their domain of application is extended to cover complex feature structures...