| 摘要 |
Policy information stores policy setting information and identification information of a policy in correlation with each other, the policy setting information correlating setting content of the policy with each data type information indicating whether data for which the policy is set is original data or derived data. A data information storage stores identification information of data for which a policy is set in correlation with the data and identification information of the policy attached to the data, and information for identifying that the data is the derived data. A searching unit identifies, in response to a searching request, identification information of a policy correlated to the data whose identification information is designated in the searching request, identifies whether target data of the searching request is the original data or the derived data. |
