<xs:element name="SecondaryPlaneAngle"> <xs:complexType> <xs:sequence> <xs:element ref="ifc:IfcPlaneAngleMeasure" maxOccurs="unbounded" /> </xs:sequence> <xs:attribute ref="ex:itemType" fixed="ifc:IfcPlaneAngleMeasure" /> <xs:attribute ref="ex:cType" fixed="list" /> <xs:attribute ref="ex:arraySize" use="optional" /> </xs:complexType> </xs:element>