University of Sussex
Browse

File(s) not publicly available

Using default inheritance to describe LTAG

chapter
posted on 2023-06-07, 13:30 authored by Roger Evans, Gerald Gazdar, David WeirDavid Weir
We present the results of an investigation into how the set of elementary trees of a Lexicalized Tree Adjoining Grammar can be represented in the lexical knowledge representation language DATR (Evans & Gazdar 1989a,b). The LTAG under consideration is based on the one described in Abeille et al. (1990). Our approach is similar to that of Vijay-Shanker & Schabes (1992) in that we formulate an inheritance hierarchy that efficiently encodes the elementary trees. However,rather than creating a new representation formalism for this task, we employ techniques of established utility in other lexically-oriented frameworks. In particular, we show how DATR’s default mechanism can be used to eliminate the need for a non-immediate dominance relation in the descriptions of the surface LTAG entries. This allows us to embed the tree structures in the feature theory in a manner reminiscent of HPSG subcategorisation frames, and hence express lexical rules as relations over feature structures.

History

Publication status

  • Published

Publisher

Universite Paris 7

Page range

79-87

Book title

Proceedings of the Third International Workshop on Tree Adjoining Grammars (TAG+3)

Place of publication

Paris

Department affiliated with

  • Informatics Publications

Full text available

  • No

Peer reviewed?

  • No

Legacy Posted Date

2006-11-22

Usage metrics

    University of Sussex (Publications)

    Categories

    No categories selected

    Exports

    RefWorks
    BibTeX
    Ref. manager
    Endnote
    DataCite
    NLM
    DC