| 摘要 |
PROBLEM TO BE SOLVED: To provide display in which connection of web documents in terms of a content is easily understandable even if a link destination that link description shows is redirected. SOLUTION: A crawler 10 repeats processing for detecting link description in the web document and acquiring the document of the link destination that description shows. Thus, information showing a link relation between the documents based on link description is constructed in a link information storage part 16. When a redirect detecting part 12 detects that the document of the link destination is redirected at the time of the acquiring processing of the crawler 10, it registers redirect information showing a pair of a source and a destination of the redirect to a redirect information storage part 18. A virtual link processing part 20 adds a virtual link to the redirect destination from the link source when redirect having the redirect source matched with the link destination of a link in the link information storage part 16 exists in the redirect information storage part 18. COPYRIGHT: (C)2005,JPO&NCIPI
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