For one app I used to generate a random function name for the decorator, then when the uplink script booted it would register that function in the data tables, along with its capabilities.
That way, I could keep my uplink scripts pretty much identical but have a way for the main server to interact with a specific external server (selected based on capability) without having to know anything about it in advance.
edit - just realised this has nothing to do with the original question, sorry for the noise 