Presentation of my position paper published at the "New forms of reasoning" ISWC workshop.

1. Change paths in reasoning! Raphael Volz FZI Forschungszentrum Informatik Universität Karlsruhe (TH) Karlsruhe, Germany 11.11.2007

3. We need a consensus benchmark (1) Recent Performance Benchmark @ FZI Note: Joint work with Jürgen Bock, Qiu Ji, Peter Haase, Pellet performance close to Racer, Sesame preformance close to OWLIM Is this evaluation representative???

4. We need a consensus benchmark (2) Shortcomings of various benchmarks Source: Timo Weithörner et al., What‘s wrong with owl benchmarks, Proc. of 2nd int. Workshop on Scalable Semantic Web Knowledge Base Systems (SSWS 2006)

5. Need for a consensus benchmark (3) Improvements Achieved with TREC Source: E. M. Voorhees, TREC: Improving Information Access through Evaluation, American Society for Information Science and Technology Vol. 32, No. 1 Oct/Nov 2005 Consensus Metric Consensus Data Sets

6. Approximate is better than nothing (1) Ontologies in WATSON Corpus Source: Mathieu d‘Acquin et al., Characterizing Knowledge on the Semantic Web with Watson, EON 2007 Workshop, Busan, Korea We need to approximate with OWL DL reasoners

10. Tractable languages make speed (1) Dez 2003 - DAML.ORG Corpus Source: Mathieu d‘Acquin et al., Characterizing Knowledge on the Semantic Web with Watson, EON 2007 Workshop, Busan, Korea Jul 2007 - WATSON Corpus Source: Raphael Volz, Web Ontology Reasoning with logic databases, dissertation, university of karlsruhe, 2004 Tractable Languages dominate (and will continue to do so)

11. Tractable languages make speed (2) Source: Markus Krötzsch, Sebastian Rudolph, and Pascal Hitzler; Complexity of Horn Description Logics Technical Report, Institute AIFB, University of Karlsruhe, 2007 Combined complexity of various DLs 1 1 1 1 3 # Available Reasoners (known to me)

12. Incremental reasoning is smart (1) Incremental answers is what we expect on the web Standard expectation for query answering on the web