Accession Number:

ADA196996

Title:

An Experimental Parser for Systemic Grammars.

Descriptive Note:

Research rept.,

Corporate Author:

UNIVERSITY OF SOUTHERN CALIFORNIA MARINA DEL REY INFORMATION SCIENCES INST

Personal Author(s):

Report Date:

1988-06-01

Pagination or Media Count:

16.0

Abstract:

This report describes a general parsing method for systematic grammars. Systematic grammars contain a paradigmatic analysis of language in addition to structural information, so a parser must assign a set of grammatical features and functions to each constituent in addition to producing a constituent structure. Our method constructs a parser by compiling systemic grammars into the notation of Functional Unification Grammar. The existing methods for parsing with unification grammars have been extended to handle a fuller range of paradigmatic descriptions. In particular, the PATR-II system has been extended by using disjunctive and conditional information in functional descriptions that are attached to phrase structure rules. The method has been tested with a large grammar of English that was originally developed for text generation. This testing is the basis for some observations about the bidirectional use of a grammar. Keywords Artificial intelligence Bidirectional grammar Computational linguistics Feature structures Functional grammar Natural language Parsing Syntax Systemic grammar Unification grammar. JHD.

Subject Categories:

  • Linguistics
  • Computer Programming and Software
  • Cybernetics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE