arangosh> a1 = db.example.insert({ a : 1 });
{
"_id" : "example/1158652460",
"_rev" : "1158652460",
"_key" : "1158652460"
}
arangosh> a2 = db.example.replace("example/3903044", { a : 2 });
{
"_id" : "example/3903044",
"_rev" : "1158849068",
"_key" : "3903044"
}