NATURAL LANGUAGE RETRIEVAL SYSTEM

摘要

PROBLEM TO BE SOLVED: To provide a natural language retrieval system for retrieving two or more retrieval object documents and sequencing, based on an input of a retrieval instruction by a natural language sentence, capable of executing retrieval according to a meaning, when words included in the natural language sentence mean that the documents are retrieval object documents having prescribed property.;SOLUTION: A retrieval object document 11 has a numerical attribute which is numerical data, a natural language retrieval system comprises a keyword extraction function for extracting a keyword from a natural language sentence 41, and a numerical word identification function for identifying a numerical word included in the keyword, and uses a comparison result of the numerical word and the numerical attribute, in sequencing.;SELECTED DRAWING: Figure 1;COPYRIGHT: (C)2017,JPO&INPIT