摘要:
Systems and methods for managing an electronic content list over a network are disclosed. In one embodiment consistent with the disclosure, an information-providing apparatus has a communication unit configured to communicate with an information-processing apparatus over the network and a processing unit. The processing unit is configured receive, via the communication unit, a request from the information-processing apparatus for a list of electronic content items stored at a service-providing unit, to determine, based on information associated with the request, whether the information-processing apparatus supports processing of a list of electronic content items containing at least one null value, and to send, via the communication unit, the list of electronic content items to the information-processing apparatus, only if it is determined that the information-processing apparatus supports processing of a list of electronic content items containing at least one null value.