<set_function_specification xmlns="http://www.sqlparser.com/xml/ansi2003"> <aggregate_function>{1,1}</aggregate_function> <grouping_operation>{1,1}</grouping_operation> </set_function_specification>
<xs:element name="set_function_specification"> <xs:complexType> <xs:choice> <xs:element ref="aggregate_function"/> <xs:element ref="grouping_operation"/> </xs:choice> </xs:complexType> </xs:element>