anchor.diff:  %% @doc Get Resource Specification by ID.
   get_resource_spec("1") ->
   	ResourceSpec = tariff_table_spec(),
  +	Body = mochijson:encode(ResourceSpec),
  +	Headers = [{content_type, "application/json"}],
  +	{ok, Headers, Body};
  +get_resource_spec("2") ->
  +	ResourceSpec = policy_table_spec(),
   	Body = mochijson:encode(ResourceSpec),
   	Headers = [{content_type, "application/json"}],
   	{ok, Headers, Body};
  
positive.code: 		_:_ ->
  			{error, 400}
  	end.
  
  
  -spec patch_pla(Id, Etag, ReqData) -> Result
  	when
  
negative.code: 	{struct, [Id, Href, Name, Description, Version, Status, LastUpdate, Category, Characteristic]}.
  
  %% @hidden
  policy_table_spec() ->
  	Id = {"id", "2"},
  	Href = {"href", ?specPath "2"},
  	Name = {"name", "PolicyTableSpec"},
  	Description = {"description", "Rating policy table"},
  	Status = {"lifecycleStatus", "Active"},
  	Version = {"version", "1.0"},
  	LastUpdate = {"lastUpdate", "2020-12-16"},
  	Category = {"category", "PolicyTable"},
  	Chars = {array, [{struct, [{"name", "name"},
  			{"description", "Name of the policy"},
  			{"valueType", "MatrixCharacteristicSpec"},
  			{"resourceSpecCharacteristicValue", {array, [{struct,
  			[{"seqNum", 1}, {"valueType", "String"}]}]}}]},
  			{struct, [{"name", "qosInformation"},
  			{"description", "Quality of Service Information"},
  			{"valueType", "MatrixCharacteristicSpec"},
  			{"resourceSpecCharacteristicValue", {array, [{struct,
  			[{"seqNum", 2}, {"valueType", {struct,
  			[{"qosClassIdentifier", "Number"},
  			{"maxRequestedBandwidthUL", "Number"},
  			{"maxRequestedBandwidthDL", "Number"}]}}]}]}}]},
  			{struct, [{"name", "chargingRule"},
  			{"description", "Charging rule"},
  			{"valueType", "MatrixCharacteristicSpec"},
  			{"resourceSpecCharacteristicValue", {array, [{struct,
  			[{"seqNum", 3}, {"valueType", "String"}]}]}}]},
  			{struct, [{"name", "flowInformation"},
  			{"description", "Flow Information"},
  			{"valueType", "MatrixCharacteristicSpec"},
  			{"resourceSpecCharacteristicValue", {array, [{struct,
  			[{"seqNum", 4}, {"valueType", {array, [
  			{struct, [{"flowDescription", "String"},
  			{"flowDirection", "Number"}]}]}}]}]}}]},
  			{struct, [{"name", "precedence"},
  			{"description", "Priority of the policy"},
  			{"valueType", "MatrixCharacteristicSpec"},
  			{"resourceSpecCharacteristicValue", {array, [{struct,
  			[{"seqNum", 5}, {"valueType", "Number"}]}]}}]}]},
  	Characteristic = {"resourceSpecCharacteristic" , Chars},
  	{struct, [Id, Href, Name, Description, Version, Status, LastUpdate, Category, Characteristic]}.
  
  %% @hidden
  tariff_table_category() ->
  	Id = {"id", "1"},
  	Href = {"href", ?categoryPath "1"},
  