| Name | ID | Description | Type | 
|---|---|---|---|
| IFC Host Element | H | IFC Host Element to contain Opening | Generic Data | 
| IFC Element Parameters | P | IFC Element Parameters including Name, Description, Identifier etc | Generic Data | 
| IFC Representation Item | R | IFC Representation Item | Geometry | 
| IFC Voiding Feature Type | T | IFC Voiding Feature Type(0=CUTOUT 1=NOTCH 2=HOLE 3=MITER 4=CHAMFER 5=EDGE 6=USERDEFINED 7=NOTDEFINED) | Integer | 
| Name | ID | Description | Type | 
|---|---|---|---|
| IFCVoidingFeature | V | IFC Voiding Feature | Geometry | 
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