private QuantitativeData aggregateSingleQuantitativeData(QuantitativeData sourceQd){
QuantitativeData aggQD = QuantitativeData.NewInstance(sourceQd.getFeature());
+ aggQD.setUnit(sourceQd.getUnit());
Set<BigDecimal> exactValues = sourceQd.getExactValues();
if(!exactValues.isEmpty()){
Comparator<BigDecimal> comp = Comparator.naturalOrder();