Well, Eva overlaps very closely with Datomic so I would recommend taking a look at the FAQ entry I wrote on the Crux/Datomic comparison (with 8 sections covering the major differences!): https://juxt.pro/crux/docs/faq.html#_comparisons
`EAV+T+added?` is the canonical data representation used by Eva, whereas Crux relies on two discrete "document" and transaction logs as the canonical representation. There are many reasons for this (data eviction, "unbundled" scalability etc.) but bitemporality (i.e. the ability to transact into the past/future) is definitely the primary reason why Crux doesn't follow the `EAV+T+Added?` pattern. You can get a feel for the indexes Crux uses here: https://github.com/juxt/crux/blob/master/src/crux/codec.clj#...
`EAV+T+added?` is the canonical data representation used by Eva, whereas Crux relies on two discrete "document" and transaction logs as the canonical representation. There are many reasons for this (data eviction, "unbundled" scalability etc.) but bitemporality (i.e. the ability to transact into the past/future) is definitely the primary reason why Crux doesn't follow the `EAV+T+Added?` pattern. You can get a feel for the indexes Crux uses here: https://github.com/juxt/crux/blob/master/src/crux/codec.clj#...