hi, i need to model labeled edges and i'm wondering about the best way to do it in a db like datomic or crux. I have relations like this, using cypher: (a:A)-[r:REL {foo: "bar", ...}]->(b:B). the off-the-shelf way to do this is to make the relation a separate entity and join to a and b on r , like {:r/id :my-id, r/a-join :id-for-a, :r/b-join :id-for-b, :edge-attr1 ..., :edge-attr2 ...} but I want to instead model it by having a have a join to r and have r have a join to b: this helps me structurally represent the directionality of this edge. hope that makes sense--can anyone comment on whether it'd be OK to pursue the latter model, and whether there are any others i ought to consider?