@helge "can you define the CreateList activity", more like. what do you do if my definition disagrees with yours?
also, how is jsonld stopping you from doing anything? it's a complete non-factor here. you can still invent as many or as few terms as you want. the only difference is in whether those terms are ambiguous or not. if you want a breakdown in communication, encourage ambiguity/conflict.
also, this is how you get central registries like IANA instead of decentralization.