| http://www.w3.org/ns/prov#value | - When the user of the computer A who is a calling source designates the name of the user of the telephone 6 which is a partner by the user identifier, the telephone application module 20a inquires the computer 2A of the directory server 23 about address information on the basis of the user identifier and obtains information such as the telephone number, telephone address, and kind of telephone rela
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