anchor.diff:  	{struct, [Id, Href, Name, Description, Version, Status, LastUpdate,
   			Category, Characteristic]}.
   
  +%%@doc policy and charging control rules.
   %% @hidden
   policy_table_spec() ->
   	Id = {"id", "3"},
  
positive.code: 	{struct, [Id, Href, Name, Description, Version, Status,
  			LastUpdate, Category]}.
  
  %% @hidden
  policy_row_spec() ->
  	Id = {"id", "4"},
  
negative.code: 	LastUpdate = {"lastUpdate", "2021-01-15"},
  	Category = {"category", "PolicyRow"},
  	Chars = {array, [{struct, [{"name", "name"},
  			{"description", "Rule name"},
  			{"valueType", "MatrixCharacteristicSpec"},
  			{"resourceSpecCharacteristicValue", {array, [{struct,
  			[{"seqNum", 1}, {"valueType", "String"}]}]}}]},
  