Term co-occurrence degree of extraction apparatus, the term co-occurrence level extraction program terms and co-occurrence degree of extraction method

摘要

PROBLEM TO BE SOLVED: To provide a term co-occurrence degree extractor capable of extracting a co-occurrence degree graph of a large scale and high similarity by approximately obtaining a co-occurrence degree between terms by a small number of times of retrieval.;SOLUTION: The term co-occurrence degree extractor 100 for extracting the co-occurrence degree graph for which the term of a retrieval object is a node and the co-occurrence degree of two optional terms of the retrieval object is an edge between the nodes corresponding to the two terms comprises: a co-occurrence degree detection accuracy determination part 20 for determining the probability of obtaining the co-occurrence degree between the terms for a non-retrieved term; a retrieval strategy decision part 21 for deciding the retrieval order of the term on the basis of the possibility determined in the co-occurrence degree detection accuracy determination part 20; a data retrieval part 22 for retrieving document data with each term of the retrieval object as a keyword according to the order decided in the retrieval strategy decision part 21; and a co-occurrence degree calculation part 24 for approximately obtaining the co-occurrence degree between the terms for the terms of the retrieval object included in a retrieval result document from the retrieval result document including the terms retrieved in the data retrieval part 22.;COPYRIGHT: (C)2009,JPO&INPIT