anchor.diff:      {ok, DataLinkModule} = rvi_common:get_json_element(["data_link_module"], Args),
   
       gen_server:cast(?SERVER, { rvi, register_services, 
  -			       [ Services, DataLinkModule ]}),
  +			       [ Services, list_to_atom(DataLinkModule) ]}),
       ok;
   
   
  
positive.code:     {ok, Services} = rvi_common:get_json_element(["services"], Args),
      {ok, DataLinkModule } = rvi_common:get_json_element(["data_link_module"], Args),
      gen_server:cast(?SERVER, { rvi, unregister_services, 
  			       [ Services, DataLinkModule ]}),
      ok;
  
  
  
negative.code: register_services(CompSpec, Services, DataLinkModule) ->
      rvi_common:notification(service_discovery, ?MODULE, register_services, 
  			    [{ services, Services },
  			     { data_link_module, atom_to_list(DataLinkModule) }],
  			    CompSpec).
  
  unregister_services(CompSpec, Services, DataLinkModule) ->
      rvi_common:notification(service_discovery, ?MODULE, unregister_service, 
  			    [{ data_link_module, atom_to_list(DataLinkModule)},
  			     { services,  Services }],
  			     CompSpec).
  
  