| http://www.w3.org/ns/prov#value | - means; a step of searching for the route based on the destination included in the packet received in said receiving step and the map data stored in said map data storing step; a step of selecting, from among the map data stored in said map data storing step, only map data including the route found in said route searching step; a billing step of calculating an amount of charge for the map data sele
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