Accession Number : AD0757896

Title :   Mapping of Linguistic Structures into Computer-Interpretable Form.

Descriptive Note : Final rept. 15 Nov 71-14 Nov 72,

Corporate Author : IBM WATSON RESEARCH CENTER YORKTOWN HEIGHTS N Y

Personal Author(s) : Petrick,Stanley R.

Report Date : DEC 1972

Pagination or Media Count : 85

Abstract : The report concerns the mapping of linguistically motivated underlying structures of English sentences into computer-interpretable code. To this end, use is made of a large transformational grammar which specifies a subset of English, the purpose of which is to serve as the input language for an experimental question answering system. A modified version of a translation mechanism due to Knuth is proposed to effect the required mapping, and five specific translators based upon that mechanism are presented and discussed. The last of these translators gives output that can be executed by the LISP System interpreter if certain necessary LISP functions have been defined and appropriate data base information has been stored. One of those LISP functions (the SET function), which is used to express the translation of noun phrases, is given special attention directed toward achieving efficient data base item retrieval and the elimination of unnecessary computation. (Author)

Descriptors :   (*ENGLISH LANGUAGE, *COMPUTER PROGRAMMING), (*TRANSFORMATIONAL GRAMMARS, COMPUTER PROGRAMMING), INFORMATION RETRIEVAL

Subject Categories : Linguistics
      Computer Programming and Software

Distribution Statement : APPROVED FOR PUBLIC RELEASE