Conditional Descriptions in Functional Unification Grammar.

Abstract

Often, a grammatical description only applies to a linguistic object when that object has certain features. Such conditional descriptions can be indirectly modeled in Kay's Functional Unification Grammar (FUG) with functional descriptions that are embedded within disjunctive alternatives. An extension to FUG is proposed that allows for a direct representation of conditional descriptions. This extension has been used to model the input conditions on the systems of systemic grammar. Conditional descriptions are formally defined in terms of logical implication and negation. This formal definition enables the use of conditional descriptions as a general notational extension to any of the unification-based grammar representation systems currently used in computational linguistics. Keywords: Natural language; Artificial intelligence; Parsing; Syntax.

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Document Details

Document Type
Technical Report
Publication Date
Nov 01, 1987
Accession Number
ADA190225

Entities

People

  • Robert Kasper

Organizations

  • University of Southern California

Tags

DTIC Thesaurus Topics

  • Air Force
  • Algorithms
  • Artificial Intelligence
  • California
  • Classification
  • Coding
  • Computational Linguistics
  • Contracts
  • Grammars
  • Information Science
  • Language
  • Linguistics
  • Natural Languages
  • Notation
  • Scientific Research
  • Security
  • Symbols

Readers

  • Computational Linguistics
  • Statistical inference.

Technology Areas

  • AI & ML
  • AI & ML - Bayesian Inference
  • AI & ML - Information Retrieval
  • AI & ML - Machine Translation