Namespace Xbim.Ifc4.QuantityResource Classes IfcPhysicalComplexQuantity IfcPhysicalQuantity IfcPhysicalSimpleQuantity IfcQuantityArea IfcQuantityCount IfcQuantityLength IfcQuantityTime IfcQuantityVolume IfcQuantityWeight Enums IfcPhysicalComplexQuantity.IfcPhysicalComplexQuantityClause IfcQuantityArea.IfcQuantityAreaClause IfcQuantityCount.IfcQuantityCountClause IfcQuantityLength.IfcQuantityLengthClause IfcQuantityTime.IfcQuantityTimeClause IfcQuantityVolume.IfcQuantityVolumeClause IfcQuantityWeight.IfcQuantityWeightClause