A numeric measure type -- IfcThermalTransmittanceMeasure,
IfcPositiveLengthMeasure, IfcCountMeasure, IfcPlaneAngleMeasure, ...
Standard property sets declare their values in these (Pset_WallCommon's
ThermalTransmittance is an IfcThermalTransmittanceMeasure, not an IfcReal),
and an IDS check on the data type fails a value written as the wrong one.
A numeric measure type --
IfcThermalTransmittanceMeasure,IfcPositiveLengthMeasure,IfcCountMeasure,IfcPlaneAngleMeasure, ... Standard property sets declare their values in these (Pset_WallCommon's ThermalTransmittance is an IfcThermalTransmittanceMeasure, not an IfcReal), and an IDS check on the data type fails a value written as the wrong one.