Crux: Open-source document database with bi-temporal graph queries
I looked through the docs and these are the main points of "bi-temporal" and "unbundled":<p>> Record the true history of your business whilst also preserving an immutable transaction record - this is the essence of bitemporality. Unlock the ability to efficiently query through time, as a developer and as an application user. Crux enables you to create retroactive corrections, simplify historical data migrations and build an integrated view of out-of-order event data.<p>> Apache Kafka for the primary storage of transactions and documents as semi-immutable logs.<p>> RocksDB or LMDB to host indexes for rich query support.