I don't think you should pursue this further. It will just waste your time. The extensions that use these filters all have their significant code compiled. I have never seen any documentation on how to use this filter, or any examples, or even talk about it. No one in the scripting group has replied to my inquiry and I don't expect them to. This is just something that was never fully implemented for the regular ACT extension developer.
You are navigating away from the AIS Discovery experience