Accession Number : AD0681531

Title :   A DEDUCTIVE QUESTION ANSWERER FOR NATURAL-LANGUAGE INFERENCE,

Corporate Author : SYSTEM DEVELOPMENT CORP SANTA MONICA CALIF

Personal Author(s) : Schwarcz,Robert M. ; Burger,John F. ; Simmons,Robert F.

Report Date : 15 NOV 1968

Pagination or Media Count : 53

Abstract : The paper describes and exemplifies in detail the question-answering aspects of the Protosynthex III prototype language processing system, which is written in LISP 1.5 and operates on the Q-32 time-sharing system. The system's data structures and their semantic organization, the deductive question-answering formalism of relational properties and complex-relation-forming operators, and the question-answering procedures which employ these features in their operation are all described and illustrated. Examples of the system's performance and of the limitations of its question-answering capability are presented and discussed. It is shown that the use of semantic information in deductive question answering greatly facilitates the process, and that a top-down procedure which works from question to answer enables effective use to be made of this information. It is concluded that the development of Protosynthex III into a practically useful system to work with large data bases is possible but will require changes in both the data structures and the algorithms used for question answering. (Author)

Descriptors :   (*PROGRAMMED INSTRUCTION, *LINGUISTICS), ENGLISH LANGUAGE, COMPUTERS, SEMANTICS, PROGRAMMING LANGUAGES, TIME SHARING, DATA PROCESSING, ALGORITHMS

Subject Categories : Humanities and History
      Linguistics

Distribution Statement : APPROVED FOR PUBLIC RELEASE