Patent ID: 7792865

Claim:
An information processing system connected to a network that executes content transmission processing in response to a request from a client through the network, the system comprising: a first apparatus and a second apparatus, the first apparatus including: a storage unit for storing a content and metadata associated with the content; a data transmission/reception unit for executing data transmission/reception processing; and a control unit for associating with the content a unique identifier as property information that is a component of the metadata, and for maintaining the unique identifier as metadata without changing the unique identifier when the content is transmitted to the second apparatus for storage, the unique identifier including at least two of a network content unique identifier, a reference object unique identifier, and a parent object unique identifier, wherein: upon storing the content a first time, the control unit assigns the unique identifier to the content, the first apparatus receives the request for the content, the first apparatus provides the unique identifier to the client, the second apparatus receives a second request for the content, the second request including the unique identifier, and the second apparatus provides the content to the client based on the unique identifier.