Paper: Encoding Lexicalized Tree Adjoining Grammars With A Nonmonotonic Inheritance Hierarchy

ACL ID P95-1011
Title Encoding Lexicalized Tree Adjoining Grammars With A Nonmonotonic Inheritance Hierarchy
Venue Annual Meeting of the Association of Computational Linguistics
Session Main Conference
Year 1995
Authors

This paper shows how DATR, a widely used formal language for lexical knowledge re- presentation, can be used to define an I_TAG lexicon as an inheritance hierarchy with in- ternal lexical rules. A bottom-up featu- ral encoding is used for LTAG trees and this allows lexical rules to be implemen- ted as covariation constraints within fea- ture structures. Such an approach elimina- tes the considerable redundancy otherwise associated with an LTAG lexicon.