Control functions permitted in the ''UNIMARC Holdings Format '' are confined to those used forsubfield codes, field separators, and record terminator, as specified in [[wikipedia:uk:ISO 2709|ISO 2709]]; character set escapesequences as specified in [[wikipedia:en:ISO/IEC 2022|ISO 2022]]; and those for indicating filing information, superscripts, andsubscripts as specified in [https://www.iso.org/standard/13047.html ISO 6630]. No control functions are allowed to specify typographicalfunctions such as italics. The use of control functions in ''UNIMARC Holdings Format '' records is fullydescribed in the ''[[UNIMARC для бібліографічних записів|UNIMARC Manual Bibliographic Format]]'', [[Додаток J|Appendix J]].