How to handle properties with domain specific prefixes?

[JPBergsma]

In the discussions about the new bio fields (see OPTIMADE issue #389), the idea came up to have domain specific prefixes.
For example, "biomol" for fields in the biomolecular domain.

I am now wondering what the best way to accommodate this in the Optimade python tools would be.
I could declare them in the trajectory and structure models, but I am not sure what kind of consequences this would have, you do not want the biomol fields to be visible for all the Optimade servers.