<query_expression xmlns="http://www.sqlparser.com/xml/ansi2003"> <with_clause>{0,1}</with_clause> <query_expression_body>{1,1}</query_expression_body> </query_expression>
<xs:element name="query_expression"> <xs:complexType> <xs:sequence> <xs:element ref="with_clause" minOccurs="0"/> <xs:element ref="query_expression_body"/> </xs:sequence> </xs:complexType> </xs:element>