| http://www.w3.org/ns/prov#value | - Requestor (SSG B) makes request R1 for Service S1 from Service Provider SSG A. Requestor (SSG C) makes request R2 for Service S2 from Service Provider SSG D. The control model for the relationships defined by the services are shown in the figure as the domains/groups of S2R2 S2R1 and S1R1 S1R2 where the providers maintain absolute control even though reporting is a combination of multiple users, m
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