graph database - ghdrako/doc_snipets GitHub Wiki neo4j openCypher ongdb - agpt licenced neo4j fork https://graphfoundation.org/ongdb/ https://www.theregister.com/2023/02/12/software_freedom_conservancy_fights_agplv3/ https://www.tigergraph.com/tigergraph-db/ https://docs.tigergraph.com/gsql-ref/current/intro/