Usage of the Jess Engine, Rules and Ontology to Query a Relational Database

Authors:
Jaroslaw Bak;Czeslaw Jedrzejek;Maciej Falkowski
Affiliations:
Institute of Control and Information Engineering, Poznan University of Technology, Poznan, Poland 60-965;Institute of Control and Information Engineering, Poznan University of Technology, Poznan, Poland 60-965;Institute of Control and Information Engineering, Poznan University of Technology, Poznan, Poland 60-965
Venue:
RuleML '09 Proceedings of the 2009 International Symposium on Rule Interchange and Applications
Year:
2009

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Abstract

We present a prototypical implementation of a library tool, the Semantic Data Library (SDL), which integrates the Jess (Java Expert System Shell) engine, rules and ontology to query a relational database. The tool extends functionalities of previous OWL2Jess with SWRL implementations and takes full advantage of the Jess engine, by separating forward and backward reasoning. The optimization of integration of all these technologies is an advancement over previous tools. We discuss the complexity of the query algorithm. As a demonstration of capability of the SDL library, we execute queries using crime ontology which is being developed in the Polish PPBW project.