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