Welcome
on the website of the Knowledge Representation working group.
The research interests of this group are the foundations of intelligent logic-based systems. Central to these systems are reasoning problems whose properties are to be investigated and for the reasoning methods to be developed from them.
The main focus of our research is on description logics, which can be used to model declarative terminologies and to enrich data by means of terminologies. Our research focuses on methods for symbolic learning of expressions in description logics and "robust" queries to description logic knowledge bases that are inconsistency-tolerant or relaxed.
Teaching
WS 2024/2025
- Lecture Modellierung (Panda Link)
- Lecture Knowledgebase Engineering (Englisch) (Panda Link)
- Seminar Advanced topics in Description Logics (Englisch) (Panda Link)
Team
Publications
Towards Practicable Algorithms for Rewriting Graph Queries beyond DL-Lite
B. Löhnert, N. Augsten, C. Okulmus, M. Ortiz, in: 22th European Semantic Web Conference (ESWC 2025), Portorož, Slovenia, n.d., p. ( accepted for publication).
Soft and Constrained Hypertree Width
M. Lanzinger, C. Okulmus, R. Pichler, A. Selzer, G. Gottlob, in: 44th ACM Symposium on Principles of Database Systems (PODS) 2025, Berlin, Germany, n.d., p. ( accepted for publication).
Common Foundations for SHACL, ShEx, and PG-Schema
S. Ahmetaj, I. Boneva, J. Hidders, K. Hose, M. Jakubowski, J.E. Labra Gayo, W. Martens, F. Mogavero, F. Murlak, C. Okulmus, A. Polleres, O. Savković, M. Šimkus, D. Tomaszuk, in: Proceedings of the ACM on Web Conference 2025, ACM, 2025, pp. 8–12.
Reasoning in Rough Description Logics with Multiple Indiscernibility Relations
R. Peñaloza, A.-Y. Turhan, in: S. Kirrane, M. Simkus, A. Soylu, D. Roman (Eds.), Rules and Reasoning - 8th International Joint Conference, RuleML+RR 2024, Bucharest, Romania, September 16-18, 2024, Proceedings, Springer, 2024, pp. 142–158.
Reasoning in Rough Description Logics with Multiple Indiscernibility Relations
R. Peñaloza, A.-Y. Turhan, in: S. Kirrane, M. Simkus, A. Soylu, D. Roman (Eds.), Rules and Reasoning - Eighth International Joint Conference, RuleML+RR 2024, Proceedings, Springer, 2024.
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Contact
Prof. Dr.-Ing. Anni-Yasmin Turhan
Knowledge Representation
Fürstenallee 11
33102 Paderborn