“…First of all, we notice that, to the best of our knowledge, there is no work except our previous work (Brahmia et al, 2017(Brahmia et al, , 2018b(Brahmia et al, , 2019a) that has studied temporal schema versioning in temporal NoSQL databases. All existing related works have dealt with either schema evolution in NoSQL databases, by keeping only last schema version with its instances, or instance versioning under a static schema.…”