- Property Manager name: File Extension
 - Criteria version: The 
v2025-09-09rule format supports thefileExtensioncriteria v1.1. - Rule format status: Deprecated, outdated rule format
 - Access: Read/Write
 - Allowed in includes: Yes
 
Matches the requested filename's extension, if present.
| Option | Type | Description | Requires | |
|---|---|---|---|---|
matchOperator | enum | Matches the contents of   | {"displayType":"enum","options":["IS_ONE_OF","IS_NOT_ONE_OF"],"tag":"select"} | |
IS_ONE_OF | Matches any of the specified   | |||
IS_NOT_ONE_OF | Does not match any of the specified   | |||
values | string array | An array of file extension strings, with no leading dot characters, for example   | {"displayType":"string array","tag":"input","todo":true} | |
matchCaseSensitive | boolean | Sets a case-sensitive match.  | {"displayType":"boolean","tag":"input","type":"checkbox"} | 
