| http://www.w3.org/ns/prov#value | - The effective period of ???9999 23:59:59??? indicates an unlimited effective period. ???Usage conditions??? includes information such as an expiration date until which the content can be used based on the usage right, a playback limit within which the content can be played back based on the usage right, the maximum number of playbacks of the content, the number of times the content can be copied (
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