GraphDB-Lite is a high-performance semantic repository created by Ontotext including a native RDF rule entailment engine. It is implemented in Java and packaged as a Storage and Inference Layer (SAIL) for the Sesame openRDF framework. The supported semantics can be configured through rule-set definition and selection. Rule-sets for OWL-Horst, unconstrained RDFS with OWL Lite and the OWL2 RL profile are included. Custom rule-sets allow tuning for optimal performance and expressivity.
The key features of the current release of GraphDB-Lite can be summarised as follows:
is a Java library without user interface. Sesame's Web UI applications can be used.
GraphDB-Lite – (c) Copyright Ontotext AD. GraphDB-Lite is not open-source software. GraphDB-Lite is licensed for use free of charge. Re-distribution of GraphDB-Lite in any form other than the original distribution package is strictly forbidden. Any form of modification or reverse-engineering of GraphDB-Lite is forbidden. GraphDB-Lite is distributed without any warranty. Full licensing information is available in the license file in the 'doc' folder of the distribution package.
GraphDB-Lite is distributed as a ZIP archive that contains the GraphDB-Lite jar, all required libraries, configuration files, documentation, sample code and data. GraphDB-Lite is designed to be used as a Storage and Inference Layer (SAIL) for the Sesame openRDF framework – no GraphDB specific interfaces are intended for external use. Sesame 2 libraries are included as part of the GraphDB distribution; the complete Sesame distribution can be downloaded from http://www.openrdf.org. Use of the rule-compiler (i.e. custom rule-sets) requires the Java Development Kit (JDK) version 1.6 or later, otherwise a Java Runtime Environment (JRE) version 1.6 or later is required.
GraphDB uses Sesame as a library, taking advantage of its APIs for storage and querying, as well as the support for a wide variety of query languages (e.g. SPARQL 1.1 and SeRQL) and RDF syntaxes (e.g. RDF/XML, N3, Turtle).
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