anchor.diff:  specification_ref([], _, Acc) ->
   	{struct, lists:reverse(Acc)}.
   
  +%% @hidden
  +match(Key, Complex, Query) ->
  +	case lists:keyfind(Key, 1, Complex) of
  +		{_, like, [Value]} ->
  +			{like, Value};
  +		{_, exact, [Value]} ->
  +			{exact, Value};
  +		false ->
  +			case lists:keyfind(Key, 1, Query) of
  +				{_, Value} ->
  +					{exact, Value};
  +				false ->
  +					'_'
  +			end
  +	end.
  +
  
positive.code: 		error:badarg ->
  			{error, 404};
  		_:_Reason1 ->
  			{error, 500}
  	end.
  
  
negative.code: -export([get_resource_category/1, get_resource_categories/1]).
  -export([get_resource_candidate/1, get_resource_candidates/1]).
  -export([get_resource_catalog/1, get_resource_catalogs/1]).
  -export([get_resource_inventory/2, get_resource_inventories/2,
  		add_resource_inventory/2, patch_resource_inventory/4,
  		delete_resource_inventory/2]).
  -export([get_pla_specs/1]).
  -export([gtt/2]).
  
  