<sql_invoked_function xmlns="http://www.sqlparser.com/xml/ansi2003">
  <function_specifiction_or_method_specification_designator>{1,1}</function_specifiction_or_method_specification_designator>
  <routine_body>{1,1}</routine_body>
</sql_invoked_function>

<xs:element name="sql_invoked_function">
  <xs:complexType>
    <xs:sequence>
      <xs:element name="function_specifiction_or_method_specification_designator">
        <xs:complexType>
          <xs:choice>
            <xs:element ref="function_specification"/>
            <xs:element ref="method_specification_designator"/>
          </xs:choice>
        </xs:complexType>
      </xs:element>
      <xs:element ref="routine_body"/>
    </xs:sequence>
  </xs:complexType>
</xs:element>

<function_specifiction_or_method_specification_designator xmlns="http://www.sqlparser.com/xml/ansi2003">
  <function_specification>{1,1}</function_specification>
  <method_specification_designator>{1,1}</method_specification_designator>
</function_specifiction_or_method_specification_designator>

<xs:element name="function_specifiction_or_method_specification_designator">
  <xs:complexType>
    <xs:choice>
      <xs:element ref="function_specification"/>
      <xs:element ref="method_specification_designator"/>
    </xs:choice>
  </xs:complexType>
</xs:element>