Information Systems Group

― Knowledge Representation and Reasoning

Robert Piro

Research Assistant

Research Interests

Robert Piro is interested in the model theoretic foundations of description logic (DL) including the characterisation of the expressiveness of DLs and the parallelisation of automated reasoning with its complexity theoretic foundations.


Model Theoretic Characterisations of Description Logics Robert Piro, submitted: August 2012.


Parallel Materialisation of Datalog Programs in Centralised, Main-Memory RDF Systems Boris Motik, Yavor Nenov, Robert Piro and Ian Horrocks, in: AAAI Publications, Twenty-Eighth AAAI Conference on Artificial Intelligence, 2014
Hybrid Reasoning on OWL RL Jacopo Urbani Robert Piro Frank van Harmelen, Henri Bal, in: Semantic Web Journal, IOS Press, 2013
Description Logic TBoxes: Model-theoretic Characterizations and Rewritability (Full paper with proofs) Carsten Lutz Robert Piro and Frank Wolter, in: Proceedings of the 22nd International Joint Conference on Artificial Intelligence (IJCAI11), 2011
Enriching EL-concepts with Greatest Fixpoints Carsten Lutz Robert Piro and Frank Wolter, in: Proceedings of the 19th European Conference on Artificial Intelligence (ECAI10) IOS Press, 2010.
EL-concepts go Second-order: Greatest Fixpoints and Simulation Quantifiers Carsten Lutz Robert Piro and Frank Wolter, in: Proceedings of the 23rd International Workshop on Description Logics (DL2010), 2010.
A Lindström characterisation of the guarded fragment and of modal logic with a global modality, Martin Otto and Robert Piro, in: Advances in Modal Logic 7, C. Areces, R. Goldblatt (eds), pp. 273-288, 2008.

Other Interests

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The following document expresses a personal opinion on beekeeping. An Opinion on Swarms


Robert Piro


Research Assistant



Contact Information

University of Oxford
Computer Science Department
Wolfson Building, Room 307,
Parks Road,
OX1 3QD , UK
+44 186 528 3520
robert.piro at cs dot ox dot ac dot uk


3 papers accepted in IJCAI'17

Three papers co-authored by the KRR group have been accepted in IJCAI'17:
- "Query Reformulation: Theory and Practice" by M. Benedikt, E. V. Kostylev, F. Mogavero, and E. Tsamoura;
- "Foundations of Declarative Data Analysis Using Limit Datalog Programs" by M. Kaminski, B. Cuenca Grau, B. Motik, E. V. Kostylev, and I. Horrocks; and
- "The Bag Semantics of Ontology-Based Data Access" by C. Nikolaou, E. V. Kostylev, G. Konstantinidis, M. Kaminski, B. Cuenca Grau, and I. Horrocks.

Paper accepted in PODS'17

The paper entitled "Benchmarking the chase" authored by Michael Benedikt, George Konstantinidis, Giansalvatore Mecca, Boris Motik, Paolo Papotti, Donatello Santoro, and Efthymia Tsamoura has been accepted in PODS'17.

Andrew Bate defends his PhD Thesis

Andrew Bate has successfully defended his PhD Thesis on Consequence Based Reasoning. Congratulations to Dr. Andrew Bate!

Best applications paper award at ISWC'16

Our paper entitled "Semantic Technologies for Data Analysis in Health Care" received the Best Applications Paper Award at the International Semantic Web Conference (ISWC 2016).

4 papers accepted in ISWC'16

Four papers authored by the KRR group have been accepted in the International Semantic Web Conference (ISWC 2016).

Best paper award at ICDT'16

Mark Kaminski and Egor Kostylev received the best paper award at ICDT 2016 for their paper entitled "Beyond Well-Designed SPARQL".