arangosh> var examples = require("@arangodb/graph-examples/example-graph.js");
arangosh> var graph = examples.loadGraph("social");
arangosh> graph.relation.save("female/alice", "female/diana", {type: "knows", _key: "aliceAndDiana"});
{
"_id" : "relation/aliceAndDiana",
"_key" : "aliceAndDiana",
"_rev" : "_YOn1g4S--_"
}
arangosh> graph.relation.update("relation/aliceAndDiana", {type: "quarreled", _key: "aliceAndDiana"});
{
"_id" : "relation/aliceAndDiana",
"_key" : "aliceAndDiana",
"_rev" : "_YOn1g4S--B",
"_oldRev" : "_YOn1g4S--_"
}