anchor.diff:      { reply, [ invalid_command ], St}.
   
   
  +		      
   handle_cast({rvi, service_available, [SvcName, _DataLinkModule] }, St) ->
       announce_service_availability(available, SvcName),
       { noreply, St };
  
positive.code: 
  %% Dispatch to regular JSON-RPC over HTTP.
  dispatch_to_local_service(URL, Command, Args) ->
      ?debug("dispatch_to_local_service():  Command:         ~p",[ CmdStr]),
      ?debug("dispatch_to_local_service():  Args:            ~p",[ Args]),
      ?debug("dispatch_to_local_service():  URL:             ~p",[ URL]),
      CmdStr = atom_to_list(Command),
      Res = rvi_common:send_json_request(URL, CmdStr, Args),
      ?debug("dispatch_to_local_service():  Result:          ~p",[ Res]),
      Res.
  
negative.code: handle_cast({rvi, service_unavailable, [SvcName, _DataLinkModule] }, St) ->
      announce_service_availability(unavailable, SvcName),
      { noreply, St };
  
  
  		      
  handle_cast({rvi, handle_remote_message, 
  