| 摘要 |
PROBLEM TO BE SOLVED: To realize retrieval with flexibility by extending both retrieval words and index words to a high order, low order, and relevant concept by using an extension database. SOLUTION: A retrieval request accepting part 201 includes a retrieval word designating part 201a, a retrieval word extension designating part 201b, and an index word extension designating part 201c. The retrieval word designating part 201a inputs a retrieval word designated by a user. The retrieval word extension designating part 201b designates how the retrieval word is extended. The index word extension designating part 201c designates which extension database has extended a word among words stored in an index as a word to be retrieved. A specific expression extending part 202 receives the retrieval word, retrieval word extension designation, and index word extension designation, and extends the retrieval word based on the retrieval word extension designation. A retrieving part 204 receives the extended retrieval word and the index word extension designation, and uses them to retrieve the word from the index. COPYRIGHT: (C)2004,JPO
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