| 摘要 |
PROBLEM TO BE SOLVED: To preferentially provide a document which is likely to be significant to a retriever to the retriever. SOLUTION: A matching level calculating part 204a in a retrieval executing part 204 calculates the matching level of each document(home page) stored in a collected document storing part 202 with a retrieval condition inputted from a request input accepting part 203 by a vector space method. Then, the matching level correcting part 204b corrects the matching level calculated by the matching level calculating part 204a by taking into consideration various attributes such as the URL of each document, its positioned hierarchy, emphasized character strings in the title or text, referenced frequency from an external page or reference frequency to an internal page, and an anchor text being the reference origin. For example, concerning a document which is much more likely linked to the other documents in the same server or a document including a keyword which is the same or similar to the retrieval condition in the anchor text being the link origin, the calculated matching level is increased with a much higher rate. COPYRIGHT: (C)2004,JPO
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