IFC2x architecture
IfcGeometricConstrainResource Definitions IfcReferenceGeometryResource Definitions IfcPresentationResource Definitions IfcConstraintResource Definitions IfcControlExtension Definitions IfcMaterialPropertyResource Definitions IfcConstructionManagementDomain Definitions IfcFMDomain Definitions IfcSharedFacilitiesElements Definitions IfcSfaredManagementElements Definitions IfcSpatialElements Definitions IfcSharedBldgElements Definitions IfcArchitectureDomain Definitions IfcKernel Definitions IfcProcessExtension Definitions IfcProductExtension Definitions IfcQuantityResource Definitions IfcPropertyResource Definitions IfcRepresentationResource Definitions IfcTopologyResource Definitions IfcProfileResource Definitions IfcGeometricModelResource Definitions IfcGeometryResource Definitions IfcMaterialResource Definitions IfcMeasureResource Definitions IfcExternalReferenceResource Definitions IfcCostResource Definitions IfcActorResource Definitions IfcApprovalResource Definitions IfcDateTimeResource Definitions IfcUtilityResource Definitions IfcHvacDomain definitions IfcSharedBldgServiceElements definitions IfcElectricalDomain definitions