qualifying schema.org "about"

[pbuttigieg]

@fils the schema.org property "about" is pretty generic - can we add a propertyID on it to narrow it down?

@smrgeoinfo and I think that this may provide users with the ability to inject more precise relationships while keeping a schema.org "shell" around it for stability.

So, roughly, would this work:

"about": { 
  "url": "www.example.org/thingThatThisThingIsTheOutputOf",
  "propertyID":  "http://purl.obolibrary.org/obo/RO_0002353"
}