| http://www.w3.org/ns/prov#value | - For example, in S165 of the search-and-reply process (FIG. 3), if it is determined that the sender device of the normal searching packet is a device whose operational setting for encrypted communication has been made (S165: NO), an error packet indicating that replies to the queries included in the searching packet are undetermined is generated (S190), and the error packet is returned to the sende
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