| http://www.w3.org/ns/prov#value | - The operation to newly register or delete ae radio device may be carried out by any authentication server, i.e., either one of the primary authentication server and the back-up authentication server. [0055] When the radio device registration or deletion is carried out, the registration information is changed, so that there is a need to take care to avoid loss of information in such a way that the
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