Interesting, but the "outside" constraint processor issue could be a show-stopper. The "gradual tightening" of the DB is a key selling point of dynamic relation

Interesting, but the "outside" constraint processor issue could be a show-stopper. The "gradual tightening" of the DB is a key selling point of dynamic relational. Parts of it could be borrowed to make DR. And it's not clear how one queries it with SQL (or something very close). A translator layer would probably be needed.