arangosh> a1 = db.example.insert({ a : 1 });
{
"_id" : "example/3903045",
"_key" : "3903045",
"_rev" : "_WcJRgGG--B"
}
arangosh> a2 = db.example.replace("example/3903044", { a : 2 });
{
"_id" : "example/3903044",
"_key" : "3903044",
"_rev" : "_WcJRgGG--D",
"_oldRev" : "_WcJRgGG--_"
}