<field_reference xmlns="http://www.sqlparser.com/xml/ansi2003"> <value_expression_primary>{1,1}</value_expression_primary> <field_name>{1,1}</field_name> </field_reference>
<xs:element name="field_reference"> <xs:complexType> <xs:sequence> <xs:element ref="value_expression_primary"/> <xs:element ref="field_name"/> </xs:sequence> </xs:complexType> </xs:element>