We could introduce a specific data class for this. For instance “metadata descriptor”, to segregate them away. Again, such ad-hoc classes had been introduced for programs, workflows and states.
I’m not sure I understood this, would you mind rephrasing?
I was indeed contemplating a relatively inexpensive way to solve this old problem. Concept is great because it’s been there forever and it will plug nicely without too much overhead. Every implementer by now has a way to handle them.