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