OWLIM is a family of semantic repositories, or RDF database management systems, with the following characteristics:

• native RDF engines, implemented in Java and compliant with Sesame
• robust support for the semantics of RDFS, OWL Horst and OWL 2 RL
• best scalability, loading and query evaluation performance

OWLIM is used in a large number of research projects and software tools. Independent opinions justifying our bold claims are referred to here.

The presentation Lowering the Cost of Data and Content Integration and enabling Searching and Querying of Billions of Facts on the Web presents the key features of OWLIM alongside an introduction to the benefits of using RDF databases for data integration and a discussion on linked data management.

SwiftOWLIM is the fastest semantic repository in the World: it supports non-trivial inference with tens of millions of statements on contemporary desktop hardware.

BigOWLIM is the most scalable semantic repository in the World: it can load tens of billions of RDF statements, using non-trivial inference and delivers outstanding multi-user query performance. BigOWLIM is a robust engine packed with advanced features that bring unmatched efficiency to a huge variety of application scenarios:

• cluster configuration that supports load-balancing and automatic fail-over to provide even greater query performance and resilience
• optimized owl:sameAs handling that delivers dramatic improvements in performance and usability when huge volumes of data from multiple sources are integrated
• hybrid querying capabilities that combine SPARQL with efficient full-text search and ranking of query results

You can download and use SwiftOWLIM free of charge for any purpose. BigOWLIM is provided free of charge for research, evaluation and development purposes. Ontotext offer maintenance packages and commercial licences for BigOWLIM.

To find out more, please refer to the OWLIM Documentation section or contact us directly.

OWLIM 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 and SeRQL) and RDF syntaxes (e.g. RDF/XML, N3, N-Triples, Turtle, etc).

The development of OWLIM has been partly supported by SEKT, TAO, TripCom, LarKC, SOA4ALL, and other FP6 and FP7 European research projects.