<sql_argument xmlns="http://www.sqlparser.com/xml/ansi2003"> <value_expression>{1,1}</value_expression> <generalized_expression>{1,1}</generalized_expression> <target_specification>{1,1}</target_specification> </sql_argument>
<xs:element name="sql_argument"> <xs:complexType> <xs:choice> <xs:element ref="value_expression"/> <xs:element ref="generalized_expression"/> <xs:element ref="target_specification"/> </xs:choice> </xs:complexType> </xs:element>