Complex sentence: Proponents of permissioned or private chains argue that the term "blockchain" may be applied to any data structure that batches data into timestamped blocks, these blockchains serve as a distributed version of multiversion concurrency control (MVCC) in databases.
Split into simpler sentences: Proponents of permissioned or private chains argue that the term "blockchain" may be applied to any data structure that batches data into time-stamped blocks. These blockchains serve as a distributed version of multiversion concurrency control (MVCC) in databases.