| Item | SPF | XML | Change | Description | IFC4x2 to IFC4x3_RC1 | 
|---|---|---|---|---|
| IfcLinearAxisSelect | ADDED | 
| Type | Description | 
|---|---|
| IfcLinearAxisWithInclination | |
| IfcCurve | 
 <xs:group name="IfcLinearAxisSelect">
  <xs:choice>
   <xs:element ref="ifc:IfcCurve"/>
   <xs:element ref="ifc:IfcLinearAxisWithInclination"/>
  </xs:choice>
 </xs:group>
TYPE IfcLinearAxisSelect = SELECT (
 IfcLinearAxisWithInclination, 
 IfcCurve);
END_TYPE;