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) : Kasper, Robert T

PDF Url : ADA196996

Report Date : Jun 1988

Pagination or Media Count : 16

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).

Descriptors :   *COMPUTATIONAL LINGUISTICS, *NATURAL LANGUAGE, *PARSERS, ARTIFICIAL INTELLIGENCE, ENGLISH LANGUAGE, GRAMMARS, PHRASE STRUCTURE GRAMMARS, SYNTAX

Subject Categories : Linguistics
      Computer Programming and Software
      Cybernetics

Distribution Statement : APPROVED FOR PUBLIC RELEASE