<character_value_function xmlns="http://www.sqlparser.com/xml/ansi2003">
  <character_substring_function>{1,1}</character_substring_function>
  <regular_expression_substring_function>{1,1}</regular_expression_substring_function>
  <regex_substring_function>{1,1}</regex_substring_function>
  <fold>{1,1}</fold>
  <transcoding>{1,1}</transcoding>
  <character_transliteration>{1,1}</character_transliteration>
  <regex_transliteration>{1,1}</regex_transliteration>
  <trim_function>{1,1}</trim_function>
  <character_overlay_function>{1,1}</character_overlay_function>
  <normalize_function>{1,1}</normalize_function>
  <specific_type_method>{1,1}</specific_type_method>
</character_value_function>

<xs:element name="character_value_function">
  <xs:complexType>
    <xs:choice>
      <xs:element ref="character_substring_function"/>
      <xs:element ref="regular_expression_substring_function"/>
      <xs:element ref="regex_substring_function"/>
      <xs:element ref="fold"/>
      <xs:element ref="transcoding"/>
      <xs:element ref="character_transliteration"/>
      <xs:element ref="regex_transliteration"/>
      <xs:element ref="trim_function"/>
      <xs:element ref="character_overlay_function"/>
      <xs:element ref="normalize_function"/>
      <xs:element ref="specific_type_method"/>
    </xs:choice>
  </xs:complexType>
</xs:element>