Inheritance, Defaults and the Lexicon

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Ted Briscoe, Ann Copestake, Valeria de Paiva
Cambridge University Press, Nov 2, 2006 - Computers - 308 pages
The lexicon is now a major focus of research in computational linguistics and natural language processing (NLP), as more linguistic theories concentrate on the lexicon and as the acquisition of an adequate vocabulary has become the chief bottleneck in developing practical NLP systems. This collection describes techniques of lexical representation within a unification-based framework and their linguistic application, concentrating on the issue of structuring the lexicon using inheritance and defaults. Topics covered include typed feature structures, default unification, lexical rules, multiple inheritance and non-monotonic reasoning. The contributions describe both theoretical results and implemented languages and systems, including DATR, the Stuttgart TFS and ISSCO's ELU. This book arose out of a workshop on default inheritance in the lexicon organized as a part of the Esprit ACQUILEX project on computational lexicography. Besides the contributed papers mentioned above, it contains a detailed description of the ACQUILEX lexical knowledge base (LKB) system and its use in the representation of lexicons extracted semi-automatically from machine-readable dictionaries.
 

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Contents

1 Introduction
1
2 Skeptical and Credulous Default Unification with Applications to Templates and Inheritance ...
13
3 Prioritised Multiple Inheritance in DATR
38
4 Some Reflections on the Conversion of the TIC Lexicon into DATR
47
5 Norms or Inference Tickets? A Frontal Collision between Intuitions
58
6 Issues in the Design of a Language for Representing Linguistic Information Based on Inheritance and Feature Structures ...
74
7 FeatureBased Inheritance Networks for Computational Lexicons
90
8 A Practical Approach to Multiple Default Inheritance for UnificationBased Lexicons
137
11 LKB Encoding of Lexical Knowledge
190
12 Defaults in Lexical Representation
223
13 Untangling Definition Structure into Knowledge Representation
246
A Bibliography of ACQUILEX Papers Connected with the LKB
275
The LKB Description Language Syntax
277
Software Availability
280
References
281
Author index
291

An Introduction
148
10 Types and Constraints in the LKB
164

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