GraphDB SE

GraphDB Standard (SE) is the commercial standalone edition of GraphDB. It is implemented in Java and packaged as a Storage and Inference Layer (SAIL) for the RDF4J RDF framework. GraphDB SE 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 SE can manage billions of explicit statements on a desktop hardware and can handle tens of billions of statements on a commodity server hardware. According to the LDBC Semantic Publishing Benchmark, GraphDB SE is one of the most scalable OWL repositories currently available.

Comparison of GraphDB Free and GraphDB SE

GraphDB SE and GraphDB Free 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 indices (enables it to scale to billions of statements even on desktop machines);

  • inference and query optimizations (ensures fast query evaluations).

GraphDB SE
  • suitable for heavy query loads.

GraphDB Free
  • suitable for low query loads and smaller projects.