<xs:group name="IfcDerivedMeasureValue"> <xs:choice> <xs:element ref="ifc:IfcVolumetricFlowRateMeasure" /> <xs:element ref="ifc:IfcTimeStamp" /> <xs:element ref="ifc:IfcThermalTransmittanceMeasure" /> <xs:element ref="ifc:IfcThermalResistanceMeasure" /> <xs:element ref="ifc:IfcThermalAdmittanceMeasure" /> <xs:element ref="ifc:IfcPressureMeasure" /> <xs:element ref="ifc:IfcPowerMeasure" /> <xs:element ref="ifc:IfcMassFlowRateMeasure" /> <xs:element ref="ifc:IfcMassDensityMeasure" /> <xs:element ref="ifc:IfcLinearVelocityMeasure" /> <xs:element ref="ifc:IfcKinematicViscosityMeasure" /> <xs:element ref="ifc:IfcIntegerCountRateMeasure" /> <xs:element ref="ifc:IfcHeatFluxDensityMeasure" /> <xs:element ref="ifc:IfcFrequencyMeasure" /> <xs:element ref="ifc:IfcEnergyMeasure" /> <xs:element ref="ifc:IfcElectricVoltageMeasure" /> <xs:element ref="ifc:IfcDynamicViscosityMeasure" /> <xs:element ref="ifc:IfcCompoundPlaneAngleMeasure" /> <xs:element ref="ifc:IfcAngularVelocityMeasure" /> <xs:element ref="ifc:IfcThermalConductivityMeasure" /> <xs:element ref="ifc:IfcMolecularWeightMeasure" /> <xs:element ref="ifc:IfcVaporPermeabilityMeasure" /> <xs:element ref="ifc:IfcMoistureDiffusivityMeasure" /> <xs:element ref="ifc:IfcIsothermalMoistureCapacityMeasure" /> <xs:element ref="ifc:IfcSpecificHeatCapacityMeasure" /> <xs:element ref="ifc:IfcMonetaryMeasure" /> <xs:element ref="ifc:IfcMagneticFluxDensityMeasure" /> <xs:element ref="ifc:IfcMagneticFluxMeasure" /> <xs:element ref="ifc:IfcLuminousFluxMeasure" /> <xs:element ref="ifc:IfcForceMeasure" /> <xs:element ref="ifc:IfcInductanceMeasure" /> <xs:element ref="ifc:IfcIlluminanceMeasure" /> <xs:element ref="ifc:IfcElectricResistanceMeasure" /> <xs:element ref="ifc:IfcElectricConductanceMeasure" /> <xs:element ref="ifc:IfcElectricChargeMeasure" /> <xs:element ref="ifc:IfcDoseEquivalentMeasure" /> <xs:element ref="ifc:IfcElectricCapacitanceMeasure" /> <xs:element ref="ifc:IfcAbsorbedDoseMeasure" /> <xs:element ref="ifc:IfcRadioActivityMeasure" /> <xs:element ref="ifc:IfcRotationalFrequencyMeasure" /> <xs:element ref="ifc:IfcTorqueMeasure" /> <xs:element ref="ifc:IfcAccelerationMeasure" /> <xs:element ref="ifc:IfcLinearForceMeasure" /> <xs:element ref="ifc:IfcLinearStiffnessMeasure" /> <xs:element ref="ifc:IfcModulusOfSubgradeReactionMeasure" /> <xs:element ref="ifc:IfcModulusOfElasticityMeasure" /> <xs:element ref="ifc:IfcMomentOfInertiaMeasure" /> <xs:element ref="ifc:IfcPlanarForceMeasure" /> <xs:element ref="ifc:IfcRotationalStiffnessMeasure" /> <xs:element ref="ifc:IfcShearModulusMeasure" /> <xs:element ref="ifc:IfcLinearMomentMeasure" /> <xs:element ref="ifc:IfcLuminousIntensityDistributionMeasure" /> <xs:element ref="ifc:IfcCurvatureMeasure" /> <xs:element ref="ifc:IfcMassPerLengthMeasure" /> <xs:element ref="ifc:IfcModulusOfLinearSubgradeReactionMeasure" /> <xs:element ref="ifc:IfcModulusOfRotationalSubgradeReactionMeasure" /> <xs:element ref="ifc:IfcRotationalMassMeasure" /> <xs:element ref="ifc:IfcSectionalAreaIntegralMeasure" /> <xs:element ref="ifc:IfcSectionModulusMeasure" /> <xs:element ref="ifc:IfcTemperatureGradientMeasure" /> <xs:element ref="ifc:IfcThermalExpansionCoefficientMeasure" /> <xs:element ref="ifc:IfcWarpingConstantMeasure" /> <xs:element ref="ifc:IfcWarpingMomentMeasure" /> <xs:element ref="ifc:IfcSoundPowerMeasure" /> <xs:element ref="ifc:IfcSoundPressureMeasure" /> <xs:element ref="ifc:IfcHeatingValueMeasure" /> <xs:element ref="ifc:IfcPHMeasure" /> <xs:element ref="ifc:IfcIonConcentrationMeasure" /> </xs:choice> </xs:group>