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#4: Service URN in Response Message If there is no mapping for a specific query, should the result be returned for a more generic query? No clear resolution Four suggestions: If there’s no urn:service:sos.foo, the server automatically returns the generic PSAP URI, since PSAPs by default handle all emergencies -- there’s no need to provide a more specific mechanism (server configuration) Return nearest guess and actual service “you wanted animal control; the fire department does cat-in-tree around here” Return error (“you’re in Holland and there is no mountain rescue”) – client can then make generic query if desired ? avoid ½ error case and pretend that a service exist that doesn’t No need since we have the sub-service listing |