arangosh> db.names.ensureIndex({ type: "skiplist", fields: [ "first" ] }); { "id" : "names/15142", "type" : "skiplist", "fields" : [ "first" ], "unique" : false, "sparse" : false, "isNewlyCreated" : true, "code" : 201 } arangosh> db.names.save({ "first" : "Tim" }); { "_id" : "names/15145", "_key" : "15145", "_rev" : "_U-_q2vK---" } arangosh> db.names.save({ "first" : "Tom" }); { "_id" : "names/15149", "_key" : "15149", "_rev" : "_U-_q2vK--_" } arangosh> db.names.save({ "first" : "John" }); { "_id" : "names/15152", "_key" : "15152", "_rev" : "_U-_q2vK--A" } arangosh> db.names.save({ "first" : "Tim" }); { "_id" : "names/15155", "_key" : "15155", "_rev" : "_U-_q2vO---" } arangosh> db.names.save({ "first" : "Tom" }); { "_id" : "names/15158", "_key" : "15158", "_rev" : "_U-_q2vO--_" }