The following table lists all special cases for checking IFC2X3 models identification of model subsets is is further restricted by the type object.
The first column shows the name to be used in the IDS entity facet. The second and third columns define the properties of matching IFC2X3 entity and type pair.
| Name in IDS facet | Occurrence entity | Type entity |
|---|---|---|
| IfcFurniture | IfcFurnishingElement | IfcFurnitureType |
| IfcSystemFurnitureElement | IfcFurnishingElement | IfcSystemFurnitureElementType |
| IfcActuator | IfcDistributionControlElement | IfcActuatorType |
| IfcAlarm | IfcDistributionControlElement | IfcAlarmType |
| IfcController | IfcDistributionControlElement | IfcControllerType |
| IfcFlowInstrument | IfcDistributionControlElement | IfcFlowInstrumentType |
| IfcSensor | IfcDistributionControlElement | IfcSensorType |
| IfcAirToAirHeatRecovery | IfcEnergyConversionDevice | IfcAirToAirHeatRecoveryType |
| IfcBoiler | IfcEnergyConversionDevice | IfcBoilerType |
| IfcChiller | IfcEnergyConversionDevice | IfcChillerType |
| IfcCoil | IfcEnergyConversionDevice | IfcCoilType |
| IfcCondenser | IfcEnergyConversionDevice | IfcCondenserType |
| IfcCooledBeam | IfcEnergyConversionDevice | IfcCooledBeamType |
| IfcCoolingTower | IfcEnergyConversionDevice | IfcCoolingTowerType |
| IfcElectricGenerator | IfcEnergyConversionDevice | IfcElectricGeneratorType |
| IfcElectricMotor | IfcEnergyConversionDevice | IfcElectricMotorType |
| IfcEvaporativeCooler | IfcEnergyConversionDevice | IfcEvaporativeCoolerType |
| IfcEvaporator | IfcEnergyConversionDevice | IfcEvaporatorType |
| IfcHeatExchanger | IfcEnergyConversionDevice | IfcHeatExchangerType |
| IfcHumidifier | IfcEnergyConversionDevice | IfcHumidifierType |
| IfcMotorConnection | IfcEnergyConversionDevice | IfcMotorConnectionType |
| IfcTransformer | IfcEnergyConversionDevice | IfcTransformerType |
| IfcTubeBundle | IfcEnergyConversionDevice | IfcTubeBundleType |
| IfcUnitaryEquipment | IfcEnergyConversionDevice | IfcUnitaryEquipmentType |
| IfcAirTerminalBox | IfcFlowController | IfcAirTerminalBoxType |
| IfcDamper | IfcFlowController | IfcDamperType |
| IfcElectricTimeControl | IfcFlowController | IfcElectricTimeControlType |
| IfcFlowMeter | IfcFlowController | IfcFlowMeterType |
| IfcProtectiveDevice | IfcFlowController | IfcProtectiveDeviceType |
| IfcSwitchingDevice | IfcFlowController | IfcSwitchingDeviceType |
| IfcValve | IfcFlowController | IfcValveType |
| IfcCableCarrierFitting | IfcFlowFitting | IfcCableCarrierFittingType |
| IfcDuctFitting | IfcFlowFitting | IfcDuctFittingType |
| IfcJunctionBox | IfcFlowFitting | IfcJunctionBoxType |
| IfcPipeFitting | IfcFlowFitting | IfcPipeFittingType |
| IfcCompressor | IfcFlowMovingDevice | IfcCompressorType |
| IfcFan | IfcFlowMovingDevice | IfcFanType |
| IfcPump | IfcFlowMovingDevice | IfcPumpType |
| IfcCableCarrierSegment | IfcFlowSegment | IfcCableCarrierSegmentType |
| IfcCableSegment | IfcFlowSegment | IfcCableSegmentType |
| IfcDuctSegment | IfcFlowSegment | IfcDuctSegmentType |
| IfcPipeSegment | IfcFlowSegment | IfcPipeSegmentType |
| IfcElectricFlowStorageDevice | IfcFlowStorageDevice | IfcElectricFlowStorageDeviceType |
| IfcTank | IfcFlowStorageDevice | IfcTankType |
| IfcAirTerminal | IfcFlowTerminal | IfcAirTerminalType |
| IfcElectricAppliance | IfcFlowTerminal | IfcElectricApplianceType |
| IfcFireSuppressionTerminal | IfcFlowTerminal | IfcFireSuppressionTerminalType |
| IfcLamp | IfcFlowTerminal | IfcLampType |
| IfcLightFixture | IfcFlowTerminal | IfcLightFixtureType |
| IfcOutlet | IfcFlowTerminal | IfcOutletType |
| IfcSanitaryTerminal | IfcFlowTerminal | IfcSanitaryTerminalType |
| IfcSpaceHeater | IfcFlowTerminal | IfcSpaceHeaterType |
| IfcStackTerminal | IfcFlowTerminal | IfcStackTerminalType |
| IfcWasteTerminal | IfcFlowTerminal | IfcWasteTerminalType |
| IfcDuctSilencer | IfcFlowTreatmentDevice | IfcDuctSilencerType |
| IfcFilter | IfcFlowTreatmentDevice | IfcFilterType |
| IfcVibrationIsolator | IfcElementComponent | IfcVibrationIsolatorType |
For example, the definition of an IDS applicability facet with entity IfcFilter, should result in the identification of all IfcFlowTreatmentDevice that are associated with a type IfcFilterType.
Similarly, the definition of a requirement with entity name IfcFilter should fail if the entity type is different from IfcFlowTreatmentDevice or its type is not IfcFilterType.
The history of these agreement can be traced in #116.