| 摘要 |
A node device connected to other node devices has a particular obtaining unit that obtains search information including, a first determination unit that applies a predetermined rule to determine whether the search information obtained by the particular obtaining unit is required to be stored in the node device. The node device has a first storage unit that stores search information when required, and a second determination unit that determines whether the search information obtained by the particular obtaining unit is newly published in the network. A second storage unit stores the search information when the second determination unit determines that the storage information is newly published. A search unit searches the content data, based on the search information stored in at least one of the first storage unit and the second storage unit. |
