| http://www.w3.org/ns/prov#value | - It will be apparent to those skilled in the relevant art that similar functionality can be achieved using protocols, such as Global System for Mobile communications (???GSM???)/Customized Applications for Mobile network Enhanced Logic (???CAMEL???), ANSI Capability Set 1 (???CS-1???), International telecommunication union (???ITU-T???) CS-1, and session initiation protocol (???SIP???), by variatio
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