From my point of view, there is an inconsistancy in the modelling of OfficialAreaReferenceValue (Entries: NetFloorArea, GrossFloorArea, EnergyReferenceArea, Stereotype CodeList) and VolumeTypeValue (Entries NetVolume, GrossVolume, EnergyReferenceVolume, Stereotype Enumeration). I see no reason to use different modelling concepts and therefore propose to define Enumerations in both cases.
From my point of view, there is an inconsistancy in the modelling of OfficialAreaReferenceValue (Entries: NetFloorArea, GrossFloorArea, EnergyReferenceArea, Stereotype CodeList) and VolumeTypeValue (Entries NetVolume, GrossVolume, EnergyReferenceVolume, Stereotype Enumeration). I see no reason to use different modelling concepts and therefore propose to define Enumerations in both cases.