| 摘要 |
PROBLEM TO BE SOLVED: To provide a document retrieving device and method capable of performing proper retrieval under the consideration of an inter-word concept hierarchy at the time of retrieving a document. SOLUTION: A thesaurus dictionary 5c is preliminarily stored with information associated with inter-word concept hierarchy such as the homonym of a prescribed word, a word being the high order concept of the prescribed word, and a word being the low order concept of the prescribed word. At the time of performing retrieval by using a retrieval key document, a controller 1a performs matching processing by using words. At that time, the matching processing of the words whose concept hierarchies are different such as words being the high order concept or low order concept of words included in the retrieval key document is also performed. As for the retrieved result, the concept hierarchy between the matched words and the words in the retrieval key document is considered, and the words included in the relatively close concept hierarchies are highly weighted.
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