| http://www.w3.org/ns/prov#value | - As shown in FIG. 6D, the search packet includes information indicating that the packet is a response packet (see a reference symbol 6D1), information on an available period of the packet (see a reference symbol 6D2), information on a link address of its own device information (see a reference symbol 6D3), and its own device information (see a reference symbol 6D4).FIG. 7A shows a data structure of
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