Jan Noessner

Alumni Researcher

jan (at) informatik.uni-mannheim.de


Research Topics

My research is concerned with finding faster inference methods for Markov logic and applying Markov logic for matching tasks. Markov Logic is a template language for Markov Logic Networks. It basically assigns weights to first order logic formulas.

For inference I mainly concentrate on the maximum a-posteriori (MAP) query which maximizes the objective given evidence. Arguable, the MAP-query is the most important inference query since learning algorithms usually apply this query multiple times for adapting the weights. For solving the MAP-query I transfer the problem to an integer linear program and use efficient solvers for its computations. In particular, I concentrate on finding meta-algorithms on improving the ILP translation.

Regarding the applications past research mainly focused on ontology matching, including object reconciliation and schema matching. Currently, I am writing my thesis.


  • Teaching Assistant in the Master course Knowledge Management, FSS 2010 and FSS 2012
  • Teaching Assistant in the Master course Artificial Intelligence II, HWS 2011 and HWS 2012
  • Leader of the team project 'Introducing a content management system in a complex organization', 2011
  • Teaching Assistant in the Bachelor course Business Informatics IV - Modelling, HWS 2013


  • MappingAssistant
  • Linking and Populating the Humanities

Open Source Software

  • RockIt - A MAP Inference solver for Markov logic which exploits parallelism and symmetry
  • ELOG - A reasoner for log-linear description logics; supports both MAP and marginal queries
  • CODI - Combinatorial Optimization for Data Integration; A successful data integration toolkit for the alignment of ontologies, schemas, and objects
  • Executor - A python online executor which helps users to easily run RockIt, ELOG, and CODI without any installation effort.
  • SWING - A generator for instance matching benchmarks utilizing the Semantic Web INstance Generation (SWING) approach

Publications (uncomplete)






  • Faraz Fallahi, Jan Noessner, Eva Maria Kiss and Heiner Stuckenschmidt MappingAssistant: Interactive Conflict-Resolution for Data Integration. , Mannheim, 2011.
  • Alfio Ferrara, Stefano Montanelli, Jan Noessner and Heiner Stuckenschmidt Benchmarking Matching Applications on the Semantic Web. In: Lecture Notes in Computer ScienceThe Semanic Web: Research and Applications : 8th Extended Semantic Web Conference, ESWC 2011, Heraklion, Crete, Greece, May 29 – June 2, 2011, Proceedings, Part II; 108-122. Springer, Berlin [u.a.], 2011.
  • Jakob Huber, Timo Sztyler, Jan Noessner and Christian Meilicke CODI: Combinatorial Optimization for Data Integration – Results for OAEI 2011. In: CEUR Workshop ProceedingsOM 2011 : Proceedings of the 6th International Workshop on Ontology Matching, In conjunction with the International Semantic Web Conference (ISWC2011) Bonn, Germany, October 24, 2011; 134-141. RWTH, Aachen, 2011.
  • Mathias Niepert, Jan Noessner, Christian Meilicke and Heiner Stuckenschmidt Probabilistic-Logical Web Data Integration. In: Lecture Notes in Computer ScienceReasoning Web. Semantic Technologies for the Web of Data : 7th International Summer School 2011, Galway, Ireland, August 23-27, 2011, Tutorial Lectures; 504-533. Springer, Berlin [u.a.], 2011.
  • Mathias Niepert, Jan Noessner and Heiner Stuckenschmidt Log-Linear Description Logics. In: Proceedings of the Twenty-Second International Joint Conference on Artificial Intelligence (IJCAI 11); 2153-2158. AAAI Press, Menlo Park, Calif., 2011.
  • no bib type
  • Jan Noessner and Mathias Niepert ELOG: A Probabilistic Reasoner for OWL EL. In: Lecture Notes in Computer ScienceWeb Reasoning and Rule Systems : 5th International Conference, RR 2011, Galway, Ireland; proceedings; 281-286. Springer, Berlin [u.a.], 2011.
  • Jan Noessner, Mathias Niepert and Heiner Stuckenschmidt Coherent Top-k Ontology Alignment for OWL EL. In: Lecture Notes in Computer ScienceScalable Uncertainty Management : 5th International Conference, SUM 2011, Dayton, OH, USA; proceedings; 415-427. Springer, Berlin [u.a.], 2011.