| http://www.w3.org/ns/prov#value | - As shown in FIG. 1, the present system is composed of a data distribution server 100 for streaming-distributing such contents as music and moving picture to a client for pay, a client side device 200 for taking in contents distributed from the distribution server 100 and reproducing the same, and a network 300 which connects the distribution server 100 and the client side device 200.
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