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RDFox Blog

Oxford Semantic Technologies Granted Another Patent for Knowledge Graph Query Optimisation

Oxford Semantic Technologies Granted Another Patent for Knowledge Graph Query Optimisation
Thomas Vout

Oxford Semantic Technologies has secured the patent, US Patent No. 11,409,698, for the application of sideways information passing to SPARQL queries. This new approach brings a significant optimization to graph database querying by drastically reducing the number of intermediate answers considered during query processing, further boosting RDFox’s lightning response.

We’re always pushing the limits of performance with RDFox but these novel techniques represent a huge leap forward for semantic technology. The optimization we’ve achieved through sideways information passing is truly revolutionary, creating even more possibilities and improving current applications across the board.
Prof. Ian Horrocks, OST Co-founder


Recurring invention and continuous innovation have firmly placed RDFox as the world’s most performant knowledge graph and reasoning engine, ensuring it routinely out performs alternatives by orders of magnitude. The pioneering sideways information passing techniques are no exception, securing RDFox’s position as the fastest graph database solution on the market.

Developed at the University of Oxford, these non-trivial algorithms support the stability and reliability provided by RDFox.


The new sideways information passing techniques add to the ever-growing arsenal of innovation behind RDFox and it shows. Our clients are using RDFox to tackle their challenges head on with its astonishing performance and unparalleled reasoning capabilities, producing a vast array of solutions from real-time edge analysis to personalized recommendations with massive data volumes.
Perhaps even more importantly is the trust our clients have in RDFox owing to its robust fortitude and explainable nature, all thanks to the persistent work and relentless expertise of the team.
Peter Crocker, OST Co-founder and CEO

This latest patent extends the claims covered by another held by Oxford Semantic Technologies: US Patent No. 11,216,456.

As widescale adoption of graph technology rises, so too does the demand for performance. Already in deployment across countless sectors by companies all over the world, it is clear to those using it that RDFox is the answer.

This continued innovation of RDFox and semantic technology is to the credit of inventors and Oxford Semantic Technologies co-founders Prof. Ian Horrocks, Prof. Boris Motik, and Dr. Yavor Nenov.

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Team and Resources

The team behind Oxford Semantic Technologies started working on RDFox in 2011 at the Computer Science Department of the University of Oxford with the conviction that flexible and high-performance reasoning was a possibility for data-intensive applications without jeopardising the correctness of the results. RDFox is the first market-ready knowledge graph designed from the ground up with reasoning in mind. Oxford Semantic Technologies is a spin-out of the University of Oxford and is backed by leading investors including Samsung Venture Investment Corporation (SVIC), Oxford Sciences Enterprises (OSE) and Oxford University Innovation (OUI).