Neo4j focuses on modeling nodes and it's relationships, and allows you to attach metadata to the later, but doesn't really have transactions as first-class obje

Neo4j focuses on modeling nodes and it's relationships, and allows you to attach metadata to the later, but doesn't really have transactions as first-class objects. Datomic focuses on modeling facts (entity-attribute-value). This is a very stable data representation that allows modelling tables, documents or graphs [1], on top of carrying transaction explicitly on an additional index for the time-travel magic. I guess Neo4j might make a good DB for ETL-ing into and running certain kinds of analysis. [1] https://hashrocket.com/blog/posts/using-datomic-as-a-graph-database https://hashrocket.com/blog/posts/using-datomic-as-a-graph-d...