Integrating Syntax, Semantics, and Discourse DARPA (Defense Advanced Research Projects Agency) Natural Language Understanding Program

Abstract

Revisions to the grammar have been made to expand coverage of various complex object types and to ensure correct labeling of nodes for semantics in these objects. We implemented a new version of syntax/semantics interaction that uses the existing semantic interpreter and applies selection restrictions expressed in terms of constraints on thematic role assignments. The semantic interpreter was extended to analyze adjectives as prenominal modifiers in the same manner that it interprets prenominal past participles. The temporal relations specifying the temporal structure of situations and the partial ordering among them consist of binary Prolog terms. A graphic display of these relations was integrated into the X-window interface. Processing of the discourse prompt/response relationship has been implemented. Three pieces of documentation were prepared describing how to use the PUNDIT system; they are included as appendices to this report. Keywords: PUNDIT text processing system; User manuals; Computational linguistics; Lexicography.

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Document Details

Document Type
Technical Report
Publication Date
Aug 01, 1988
Accession Number
ADA200485

Entities

People

  • Lynette Hirschman

Tags

Communities of Interest

  • C4I
  • Weapons Technologies

DTIC Thesaurus Topics

  • Anti-Submarine Missiles
  • Artificial Intelligence
  • Computational Linguistics
  • Computer Science
  • Construction
  • Debugging
  • Defense Systems
  • Dictionaries
  • Grammars
  • Information Processing
  • Language
  • Linguistics
  • Natural Language Processing
  • Natural Language Understanding
  • Natural Languages
  • New York
  • Syntax

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  • Computational Linguistics
  • Database Systems and Applications