Keyword extracting equipment and keyword selection manner

摘要

PURPOSE: To provide a keyword extraction device which can execute retrieval with a high adaptabitity and which can extract an appropriat keyword. ;CONSTITUTION: An expression extraction part 3 morpheme-analyzes document data which is read by a data input part 2 in a morpheme analysis part 11, and extracts expression becoming the candidate of the keyword in accordance with an expression candidate extraction rule with a part of speech in a word group extraction part 12. A relation extraction part 4 analyzes a relation between words and phrases constituting expression extracted in the expression extraction part 3, converts it into a relation mark showing the relation, and generates relation expression with the plural words and phrases. A relation expression selection part 5 extracts relation expression which is constituted by the same words and phrases and by which the relation marks are not contradicted each other, and selects only relation expression having the relation mark whose abstraction degree is the lowest as the keyword candidate. The extracted keyword is recorded in a storage part 6 with the inputted document.;COPYRIGHT: (C)1995,JPO