GraphDB Free¶
GraphDB Free is the free standalone edition of GraphDB. It is implemented in Java and packaged as a Storage and Inference Layer (SAIL) for the RDF4J RDF framework. GraphDB Free is a native RDF rule-entailment and storage engine. The supported semantics can be configured through ruleset definition and selection. Included are rulesets for OWL-Horst, unconstrained RDFS with OWL Lite, and the OWL2 profiles RL and QL. Custom rulesets allow tuning for optimal performance and expressivity.
Reasoning and query evaluation are performed over a persistent storage layer. Loading, reasoning, and query evaluation proceed extremely quickly even against huge ontologies and knowledge bases.
GraphDB Free can manage billions of explicit statements on a desktop hardware and can handle tens of billions of statements on a commodity server hardware.
Comparison of GraphDB Free and GraphDB SE¶
GraphDB Free and GraphDB SE are identical in terms of usage and integration and share most features:
designed as an enterprise-grade semantic repository system;
suitable for massive volumes of data;
file-based indexes (enables it to scale to billions of statements even on desktop machines);
inference and query optimizations (ensures fast query evaluations).
- GraphDB Free
suitable for low query loads and smaller projects.
- GraphDB SE
suitable for heavy query loads.