<sql_language_character xmlns="http://www.sqlparser.com/xml/ansi2003"> <simple_latin_letter>{1,1}</simple_latin_letter> <digit>{1,1}</digit> <sql_special_character>{1,1}</sql_special_character> </sql_language_character>
<xs:element name="sql_language_character"> <xs:complexType> <xs:choice> <xs:element ref="simple_latin_letter"/> <xs:element ref="digit"/> <xs:element ref="sql_special_character"/> </xs:choice> </xs:complexType> </xs:element>