<target_specification xmlns="http://www.sqlparser.com/xml/ansi2003">
  <host_parameter_specification>{1,1}</host_parameter_specification>
  <sql_parameter_reference>{1,1}</sql_parameter_reference>
  <column_reference>{1,1}</column_reference>
  <target_array_element_specification>{1,1}</target_array_element_specification>
  <dynamic_parameter_specification>{1,1}</dynamic_parameter_specification>
  <embedded_variable_specification>{1,1}</embedded_variable_specification>
</target_specification>

<xs:element name="target_specification">
  <xs:complexType>
    <xs:choice>
      <xs:element ref="host_parameter_specification"/>
      <xs:element ref="sql_parameter_reference"/>
      <xs:element ref="column_reference"/>
      <xs:element ref="target_array_element_specification"/>
      <xs:element ref="dynamic_parameter_specification"/>
      <xs:element ref="embedded_variable_specification"/>
    </xs:choice>
  </xs:complexType>
</xs:element>