| http://www.w3.org/ns/prov#value | - If a subscriber who is bearing costs for the call is a pre-paid subscriber, and some costs of the call will be generated by a network other than the one to which that subscriber belongs then data either on the state of the subscriber's pre-paid balance or on the basis for charging for the call must be shared between the networks so that the call can be terminated if the subscriber's balance is use
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