| Attributes |
| Name | Required | Request-time | Type | Description |
| extensions | false | false | java.lang.String | String representing the list of extensions to check for a file, separated by commas. |
| authorized | false | false | java.lang.String | Boolean indicating if the list of extensions represents authorized extensions or unauthorized ones. Defaults to true. |
| binding | false | false | java.lang.String | A ValueExpression that evaluates to an instance of the validator. |
| hidden | false | false | java.lang.String | Boolean indicating if the list of extensions is displayed. Defaults to false. |