Select type enabling the choice between IfcBooleanResult and subtypes of IfcCsgPrimitive3D as potential root tree expression at IfcCsgSolid.
{ .extDef}
NOTE Definition from ISO 10303-42: This type identifies the types of entity which may be selected as the root of a CSG tree including a single CSG primitive as a special case.
NOTE Corresponding STEP type csg_select defined in ISO 10303-42.
HISTORY New type in IFC1.5.1.