anchor.diff:  map_property(<<"material">>, Value, Acc) ->
       %% Single material as value
       Acc#{<<"rdfs:label">> => Value};
  -map_property(<<"rights">>, Value, Acc) ->
  -    Acc2 = Acc#{<<"rights">> => Value},
  +map_property(<<"notes">>, Values, Acc) ->
  +    Acc#{<<"dbpedia-owl:notes">> => to_list(Values)};
  +map_property(<<"rights">> = Key, Value, Acc) ->
  +    Acc2 = Acc#{Key => Value},
       case m_creative_commons:url_for(Value) of
           undefined ->
               Acc2;
  
positive.code:     Acc#{<<"schema:unitCode">> => map_dimension_unit(Value),
          <<"schema:unitText">> => Value
      };
  map_property(Key, [Value], Acc) ->
      map_property(Key, Value, Acc);
  map_property(Key, Value, Acc) ->
      Acc#{Key => Value}.
  
  map_dimension(#{<<"dimension.type">> := Type, <<"dimension.value">> := Value}, Acc) ->
      Acc#{map_dimension_type(Type) => #{
          <<"rdf:type">> => <<"schema:QuantitativeValue">>,
          <<"schema:value">> => Value
      }};
  map_dimension(_DimensionWithoutVolumeOrType, Acc) ->
      Acc.
  
  %% @doc Map dimension unit to UN/CEFACT Common Codes for Units of Measurement
  
negative.code:     <<"schema:height">>;
  map_dimension_type(<<"diameter">>) ->
      <<"dbpedia-owl:diameter">>;
  map_dimension_type(_Type) ->
      undefined.
  
  to_list(Values) when is_list(Values) ->
      Values;
  