Namespace Xbim.Ifc2x3.ProductExtension Classes IfcAnnotation IfcBuilding IfcBuildingElement IfcBuildingElementProxy IfcBuildingElementProxyType IfcBuildingElementType IfcBuildingStorey IfcCovering IfcCoveringType IfcDistributionElement IfcDistributionElementType IfcElectricalElement IfcElement IfcElementAssembly IfcElementQuantity IfcElementType IfcEquipmentElement IfcFeatureElement IfcFeatureElementAddition IfcFeatureElementSubtraction IfcFurnishingElement IfcFurnishingElementType IfcGrid IfcOpeningElement IfcPort IfcProjectionElement IfcRelAssociatesMaterial IfcRelConnectsElements IfcRelConnectsPorts IfcRelConnectsPortToElement IfcRelConnectsWithRealizingElements IfcRelContainedInSpatialStructure IfcRelCoversBldgElements IfcRelCoversSpaces IfcRelFillsElement IfcRelProjectsElement IfcRelReferencedInSpatialStructure IfcRelServicesBuildings IfcRelSpaceBoundary IfcRelVoidsElement IfcSite IfcSpace IfcSpaceType IfcSpatialStructureElement IfcSpatialStructureElementType IfcSystem IfcTransportElement IfcTransportElementType IfcVirtualElement IfcZone Enums IfcAssemblyPlaceEnum IfcBuildingElementProxy.IfcBuildingElementProxyClause IfcBuildingElementProxyTypeEnum IfcCovering.IfcCoveringClause IfcCoveringTypeEnum IfcElementAssembly.IfcElementAssemblyClause IfcElementAssemblyTypeEnum IfcElementCompositionEnum IfcGrid.IfcGridClause IfcInternalOrExternalEnum IfcPhysicalOrVirtualEnum IfcRelAssociatesMaterial.IfcRelAssociatesMaterialClause IfcRelConnectsElements.IfcRelConnectsElementsClause IfcRelContainedInSpatialStructure.IfcRelContainedInSpatialStructureClause IfcRelReferencedInSpatialStructure.IfcRelReferencedInSpatialStructureClause IfcRelSpaceBoundary.IfcRelSpaceBoundaryClause IfcSpaceTypeEnum IfcSpatialStructureElement.IfcSpatialStructureElementClause IfcTransportElementTypeEnum IfcZone.IfcZoneClause