Grakn is a DBMS designed for knowledge bases to intelligent systems. Grakn allows intelligent systems to interpret complex datasets as a single body of knowledge that can be logically reasoned over.
Grakn originally started at the University of Cambridge Computer Lab. It became a commercial product in 2016.
Grakn supports the entity-relationship model for graph datasets. Users can model type hierarchies, hyper-entities, hyper-relationships, and rules.
Distributed Semantic Database
Commercial, Open Source
Linux, OS X, Windows