| Item | SPF | XML | Change | Description | IFC4x2 to IFC4x3_RC1 | 
|---|---|---|---|---|
| IfcInterferenceSelect | ADDED | 
A select type that groups together physical and spatial elements for the purpose of defining interferences between these elements.
| Type | Description | 
|---|---|
| IfcSpatialElement | |
| IfcElement | 
 <xs:group name="IfcInterferenceSelect">
  <xs:choice>
   <xs:element ref="ifc:IfcElement"/>
   <xs:element ref="ifc:IfcSpatialElement"/>
  </xs:choice>
 </xs:group>
TYPE IfcInterferenceSelect = SELECT (
 IfcSpatialElement, 
 IfcElement);
END_TYPE;
  References: IfcRelInterferesElements