RELEVANT KEYWORD EXTRACTION METHOD AND DEVICE AND PROGRAM AND COMPUTER-READABLE RECORDING MEDIUM

摘要

PROBLEM TO BE SOLVED: To extract an analysis object relevant keyword by narrowing it down only to an analysis object phrase considered in the same way as an analysis object phrase. SOLUTION: A relevant keyword extraction method includes: accepting an analysis object keyword from the outside; performing access to an information resource; extracting a set of transmitters who have formed articles including the analysis object keyword; extracting a set of documents created by a transmitter who is interested in the analysis object keyword from information source; extracting a phrase included in the document; calculating relevancy representing frequency by using a phrase which is characteristically used in many cases by the transmitter who has transmitted the analysis object keyword as a relevant keyword; determining whether the relevant keyword is a phrase to be used as a phrase unique to a field or a phrase to be used for an individual topic about the relevant keyword; and extracting the phrase whose inclination is similar to that of the analysis object keyword as a relevant keyword considered in the same way as the analysis object keyword. COPYRIGHT: (C)2010,JPO&INPIT