Word significance calculating device, the document retrieval system, a word importance calculation program a computer readable recording the recording medium and the document search program computer-readable recording medium recording a

摘要

PROBLEM TO BE SOLVED: To accurately discriminate a word having a high degree of word importance and to obtain a retrieval result of high reliability in a short time independently of retriever's skill. ;SOLUTION: A word extraction part 30 which takes plural retrieval object documents as the object to extract respective words included in each retrieval object document and a word importance degree calculation processing part 40 which selects words to be the word importance degree calculation object from the extraction result of the word extraction part 30 one by one to select a retrieval object document including a word to be a calculation object from plural retrieval object documents are provided, and the word importance degree calculation processing part 40 counts not only words other than calculation object words in all selected retrieval object documents but also the number of all selected retrieval object documents and calculates word importance degrees of calculation object words included in plural retrieval object documents on the basis of two counted results.;COPYRIGHT: (C)2001,JPO