DOCUMENT RETRIEVAL SYSTEM, DOCUMENT RETRIEVAL APPARATUS, DOCUMENT RETRIEVAL METHOD AND DOCUMENT RETRIEVAL PROGRAM

摘要

PROBLEM TO BE SOLVED: To provide a document retrieving system capable of calculating accurate scores even under distributed environments. SOLUTION: A management apparatus 10 comprises: a registered documents acquisition means for acquiring the numbers of registered documents stored in respective document data storage means from respective document retrieving devices; a total-registered documents calculation means for calculating the total number of registered documents corresponding to the whole of the plurality of document data storage means on the basis of the numbers of registered documents; a document frequency acquisition means for acquiring the document frequencies of respective document data storage means from respective document retrieving devices; and a total document frequency calculation means for calculating the total document frequency of the whole of the plurality of document data storage means on the basis of the document frequencies. Each of the document retrieving devices 20a to 20c is provided with a score calculation means for calculating a score of retrieval keywords on the basis of the total document frequency calculated by the total document frequency calculation means. COPYRIGHT: (C)2007,JPO&INPIT