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