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