File Extension
The File Extension validation checks the contents of a specified server variable to determine if its value ends in a specified file extension format. It can also be configured to accept blank entries.

Set the configuration options and click OK to complete configuration of the validation within the Server Validation dialog.
The following options are available for configuration of the File Extension validation:

Set the configuration options and click OK to complete configuration of the validation within the Server Validation dialog.
The following options are available for configuration of the File Extension validation:
- Allow: Enter the file extensions that the validation can accept. Be sure to include the preceding period (.), and separate multiple entries using a comma, or a comma and a space.
- Allow blank entry: configures the validation to allow blank entries or not allow them.