A great deal of the DXF controls are able to use at least one validation. This section will explain how to use every validation available and in which controls they can be applied.
You can specify the allowed protocols in a url or a list of urls using the protocols attribute.
To use this validation, you must have the validation url or the listurls / listurl and add the attribute protocols with the list of the protocols separated by a comma ( , )
If a settings variable is used for the protocol, the validation is ignored.