| 摘要 |
The invention discloses a method, system, target terminal device, subject terminal device and computer programs for maintaining and updating data contents in at least one data content server and target terminal device. In one embodiment, a data content change relating to a subject terminal device is detected in a data content server. The data content server transmits an identifier to at least one target terminal device. If the at least one target terminal device has data content corresponding to the received identifier in its memory, it may use it. If such a data content corresponding to the received identifier is not found in its memory, the at least one target terminal device requests the changed data content from the data content server.
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