| http://www.w3.org/ns/prov#value | - It is constituted by guide information transmitting means, additional user information receiving means, contents output means, information for use receiving means (command from the user terminal 3 in preview) and the like.The input/output unit 22 is composed of, for example, an output device, such as a display and a printer, and an input device, such as a keyboard and a mouse.
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