arangosh> a1 = db.example.insert({"a" : 1}); { "_id" : "example/15023", "_key" : "15023", "_rev" : "_U-_q2oy--_" } arangosh> a2 = db.example.update("example/18612115", { "x" : 1, "y" : 2 }); { "_id" : "example/18612115", "_key" : "18612115", "_rev" : "_U-_q2oy--A", "_oldRev" : "_U-_q2oy---" }