Evans, Roger, Gazdar, Gerald and Weir, David (1994) Using default inheritance to describe LTAG. In: Proceedings of the Third International Workshop on Tree Adjoining Grammars (TAG+3). Universite Paris 7, Paris.Full text not available from this repository.
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.
|Item Type:||Book Section|
|Schools and Departments:||School of Engineering and Informatics > Informatics|
|Subjects:||Q Science > QA Mathematics > QA0075 Electronic computers. Computer science
P Language and Literature > P Philology. Linguistics
Q Science > QA Mathematics > QA0076 Computer software
|Depositing User:||David Weir|
|Date Deposited:||22 Nov 2006|
|Last Modified:||30 Nov 2012 16:50|
|Google Scholar:||5 Citations|