| Introduced with {{Mark|BaseX 9.7}}: In Excel, a value will be interpreted if it starts with the character {{Code|-}}, {{Code|+}}, <code>=</code>, {{Code|@}}, TAB {{Code|\t}} or CR{{Code|\r}}. A regular expression can be specified to reject data that will be rendered differently than expected or that may be malicious (see https://owasp.org/www-community/attacks/CSV_Injection for more details).