DATA MANAGEMENT DEVICE, DATA MANAGEMENT METHOD AND DATA MANAGEMENT PROGRAM

摘要

PROBLEM TO BE SOLVED: To easily provide a data transition.SOLUTION: A data management device comprises: a memory section; a storage section; and a retrieval section. The memory section stores attribute information about a predetermined thing and an expiration date indicating a date that the attribute information corresponds to an attribute of the thing in association with each other. The storage section updates an expiration date indicating that a present time is within the expiration date among expiration dates stored in the memory section to a date that the latest attribute information corresponding to the expiration date does not correspond to the attribute of the thing when receiving an update request for updating the attribute information, and stores a new attribute information included in the update request and an expiration date indicating that the new attribute information corresponds to the attribute of the thing at the present time in the memory section. The retrieval section retrieves attribute information included in a retrieval request from the memory section when receiving the retrieval request of the attribute information.