| http://www.w3.org/ns/prov#value | - PRIOR ART [0002] Conventionally, a data delivery terminal of such a kind is a computer such as a personal computer (PC) which is connected to the Internet via a telephone line so as to access a predetermined homepage and download content data such as music data, image data and etc. [0003] However, in the prior art, each time desired content data is downloaded, there is a need to access a predeterm
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