arangosh> a1 = db.example.insert({"a" : 1}); { "_id" : "example/1144920786", "_rev" : "1144920786", "_key" : "1144920786" } arangosh> a2 = db.example.update("example/18612115", { "x" : 1, "y" : 2 }); { "_id" : "example/18612115", "_rev" : "1145314002", "_key" : "18612115" }