Triple stores
Triple stores (aka, RDF stores) are graph databases for the Semantic Web.
Standards
- RDF: Resource Description Framework
- SPARQL: SPARQL Protocol and RDF Query Language
- SPIN : SPARQL Inferencing Notation
Databases
- Apache Jena
- Includes RDF store TDB and SPARQL server Fuseki , among other things
- Most popular pure triple store
- RDF and Fuseki supported by IBM DB2 but now deprecated
- Virtuoso
- License: GPL + commercial (with virtual databases and replication)
- Multi-model: RDF, SQL, JSON, XML
- AllegroGraph
- License: Commercial (incl. “free edition”)
- Supports SPARQL, SPIN, and Prolog queries
- Stardog
- License: Commercial (incl. free “community edition”)
- Supports SPARQL and TinkerPop 3 queries
- GraphDB
- Parliament
- License: BSD
- Supports temporal indexes and GeoSPARQL