| 摘要 |
A browsing unit according to the present invention comprises an input means for receiving request for a node from a user, an information obtaining means for obtaining the requested node from a server, content information output means for outputting the content information of the obtained node, a related information extracting means for extracting structural information from the content information of the received node, a historical information storing means for storing the structural information obtained by the related information extracting means, and a structure display means for displaying to the user in the form of a map the structural information stored by the historical information storing means.
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