<xs:element name="Elements"> <xs:complexType> <xs:group ref="ifc:IfcGeometricSetSelect" maxOccurs="unbounded" /> <xs:attribute ref="ex:itemType" fixed="ifc:IfcGeometricSetSelect" /> <xs:attribute ref="ex:cType" fixed="set" /> <xs:attribute ref="ex:arraySize" use="optional" /> </xs:complexType> </xs:element>