Accession Number : ADA200485


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


Descriptive Note : Status rept. 1 May-1 Aug 1988


Corporate Author : UNISYS DEFENSE SYSTEMS PAOLI PA


Personal Author(s) : Hirschman, Lynette


Full Text : http://www.dtic.mil/get-tr-doc/pdf?AD=ADA200485


Report Date : 01 AUG 1988


Pagination or Media Count : 74


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.


Descriptors :   *NATURAL LANGUAGE , *TEXT PROCESSING , INTERACTIONS , SEMANTICS , GRAPHICS , ARTIFICIAL INTELLIGENCE , GRAMMARS , COMPUTATIONAL LINGUISTICS , SYNTAX , LEXICOGRAPHY , INTEGRATED SYSTEMS , USER MANUALS , SELECTION


Subject Categories : LINGUISTICS


Distribution Statement : APPROVED FOR PUBLIC RELEASE