I haven't looked deeply into this particular project but I agree with you: the hypergraph data model seems to add too much complexity for too little bang compared to a generic graph model. The Neo4j graph database:<p><a href="http://neo4j.org" rel="nofollow">http://neo4j.org</a><p>is based on generic property graphs. We sometimes get requests for hypergraph features, but we've found that the real-world problems are always solvable through a normal graph. Either way, it's very nice to see more open source graph databases out there!<p>-EE