TU Wien Informatics

About

Our research lies at the intersection of data management, knowledge graphs, and artificial intelligence, with a strong emphasis on scalable, reliable, and semantics-aware methods.

We investigate how large, heterogeneous, and complex data can be transformed into structured knowledge and effectively combined with modern AI techniques, such as large language models, to design and build intelligent systems. A central goal of our work is to enable meaningful, trustworthy, and reusable data-driven systems, with a particular focus on healthcare, bioscience, and data-intensive analytics, while maintaining strong theoretical foundations and real-world impact.

The research Unit Data Management is part of the Institute of Information Systems Engineering.

Katja Hose
Katja Hose K. Hose

Head of Research Unit
Univ.Prof. Dr.

Bosse Behrens
Bosse Behrens B. Behrens

Student Staff
BSc

  • Graph-Native Normalization : Reducing Redundancy in Labeled Property Graphs / Schrott, J. (2026, September 4). Graph-Native Normalization : Reducing Redundancy in Labeled Property Graphs [Presentation]. Twenty-First GDC TUC Meeting, Boston, United States of America (the). http://hdl.handle.net/20.500.12708/230674
    Projects: DORSET (2026–2029) / TARGET (2024–2028)
  • DataKernelBench: Can LLMs Optimize Database Queries on GPUs? / Kumar, G. K., Perlitz, Y., Lammie, C., Giovannini, A., & Hose, K. (2026). DataKernelBench: Can LLMs Optimize Database Queries on GPUs? arXiv. https://doi.org/10.48550/ARXIV.2608.25061
    Project: ARMADA (2025–2029)
  • Computing Why-Provenance for Property Graph Queries / Ganepola, K., Jakubowski, M., & Hose, K. (2026). Computing Why-Provenance for Property Graph Queries. Proceedings of the VLDB Endowment, 19(11), 3552–3564. https://doi.org/10.14778/3836663.3836708
    Download: PDF (2.49 MB)
    Projects: DeConquer (2023–2027) / KnowledgeGraph (2020–2028)
  • A Community Survey on {SHACL} and ShEx: Briding Gaps in RDF Validation / Jakubowski, M., Tomaszuk, D., & Hose, K. (2026). A Community Survey on {SHACL} and ShEx: Briding Gaps in RDF Validation. arXiv. https://doi.org/10.48550/ARXIV.2606.03502
  • Exploring the Landscape of Data Fusion / Akter, Y. A., Abello, A., Jovanovic, P., Sagi, T., & Hose, K. (2026). Exploring the Landscape of Data Fusion. In G. DEJAEGERE, A. Abelló, K. Torp, & A. Simitsis (Eds.), Data Engineering for Data Science (pp. 33–62). Springer Cham. https://doi.org/10.1007/978-3-032-18765-9_2
  • Example-Based Explainability in Machine Learning / Nematov, I., Sacharidis, D., Hose, K., & Sagi, T. (2026). Example-Based Explainability in Machine Learning. In G. DEJAEGERE, A. Abelló, K. Torp, & A. Simitsis (Eds.), Data Engineering for Data Science (pp. 215–234). Springer Cham. https://doi.org/10.1007/978-3-032-18765-9_9
  • Scalable and Privacy-Aware Relational Data Synthesis / Kapenekakis, A., Dell’Aglio, D., Bøgsted, M., Garofalakis, M., & Hose, K. (2026). Scalable and Privacy-Aware Relational Data Synthesis. In G. DEJAEGERE, A. Abelló, K. Torp, & A. Simitsis (Eds.), Data Engineering for Data Science (pp. 63–77). Springer Cham. https://doi.org/10.1007/978-3-032-18765-9_3
  • MetriKG: Profiling Static and Evolving Knowledge Graphs / Günes, H. H., Jovanovik, M., & Hose, K. (2026). MetriKG: Profiling Static and Evolving Knowledge Graphs. In H. Hacid & Y. Maarek (Eds.), WWW Companion ’26: Companion Proceedings of the ACM Web Conference 2026 (pp. 200–203). Association for Computing Machinery. https://doi.org/10.1145/3774905.3793136
    Download: PDF (1.35 MB)
    Projects: DORSET (2026–2029) / TARGET (2024–2028)
  • Expressive Querying and Scalable Management of Large RDF Archives / Pelgrin, O., Taelman, R., Galárraga, L., & Hose, K. (2026). Expressive Querying and Scalable Management of Large RDF Archives. Semantic Web, 17(3). https://doi.org/10.1177/22104968261431405
  • Amalgam: Hybrid LLM-PGM Synthesis Algorithm for Accuracy and Realism / Kapenekakis, A., Thomsen, B., Hose, K., & Albano, M. (2026). Amalgam: Hybrid LLM-PGM Synthesis Algorithm for Accuracy and Realism. arXiv. https://doi.org/10.48550/ARXIV.2603.27254
  • Native Provenance Computation for Federated and Non-Federated SPARQL Queries / Asma, Z., Hernández Castillo, D. A., Galárraga, L., Flouris, G., Fundulaki, I., & Hose, K. (2026). Native Provenance Computation for Federated and Non-Federated SPARQL Queries. Transactions on Graph Data and Knowledge, 4(1), 4:1-4:43. https://doi.org/10.4230/TGDK.4.1.4
  • How Human-Centric Are Our Graph Data Abstractions? / Bonifati, A., Dimou, A., Dumbrava, S., Fletcher, G., Hose, K., Konstantinidis, G., Labra-Gayo, J. E., Martens, W., Pardal, N., Peterfreund, L., Thornton, K., Vidal, M.-E., & Voigt, H. (2026). How Human-Centric Are Our Graph Data Abstractions? Transactions on Graph Data and Knowledge, 4(2), 2:1-2:31. https://doi.org/10.4230/TGDK.4.2.2
  • An End-To-End Re-Evaluation of Table Entity-Linkers / Christensen, M. P., Lissandrini, M., & Hose, K. (2026). An End-To-End Re-Evaluation of Table Entity-Linkers. In 2026 IEEE 42nd International Conference on Data Engineering (ICDE) (pp. 1703–1716). IEEE. https://doi.org/10.1109/ICDE65706.2026.00130
  • SEOntology: A Domain Ontology for Semantic Modeling of Search Engine Optimization Workflows / Gjorgjevska, E., Riccitelli, D., Jovanovik, M., & Volpini, A. (2026). SEOntology: A Domain Ontology for Semantic Modeling of Search Engine Optimization Workflows. In Bridging the Gap Between Curated and Induced Semantics : Proceedings of the 22nd International  Conference on Semantic Systems,  15-17 September 2026, Ghent, Belgium (pp. 2–18). IOS Press. https://doi.org/10.3233/SSW260003
    Download: PDF (942 KB)
  • Reducing LLM Hallucinations with Knowledge Graphs: A Survey / Dolci, T., Jovanovik, M., & Hose, K. (2026). Reducing LLM Hallucinations with Knowledge Graphs: A Survey. HAL (open archive). https://doi.org/10.34726/12684
    Download: PDF (4.11 MB)
    Project: ARMADA (2025–2029)
  • Common Foundations for Recursive Shape Languages / Ahmetaj, S., Boneva, I., Hidders, J., Jakubowski, M., Labra-Gayo, J.-E., Martens, W., Mogavero, F., Murlak, F., Okulmus, C., Savkovic, O., Šimkus, M., & Tomaszuk, D. (2026). Common Foundations for Recursive Shape Languages. In Proceedings of the 23rd International Conference on Principles of Knowledge Representation and Reasoning (pp. 2–13). IJCAI Organization. https://doi.org/10.24963/kr.2026/1
    Projects: BILAI (2024–2029) / KtoAPP (2018–2025) / Ontegra (2024–2027)
  • Source Attribution in Retrieval-Augmented Generation / Nematov, I., Kalai, T., Kuzmenko, E., Fugagnoli, G., Sacharidis, D., Hose, K., & Sagi, T. (2026). Source Attribution in Retrieval-Augmented Generation. In I. Koprinska, J. Mendes-Moreiram, & P. Branco (Eds.), Machine Learning and Principles and Practice of Knowledge Discovery in Databases : International Workshops of ECML PKDD 2025, Porto, Portugal, September 15–19, 2025, Revised Selected Papers, Part II (pp. 317–332). Springer. https://doi.org/10.1007/978-3-032-19099-4_23
  • Jazero: A Semantic Table Search System / Christensen, M. P., Lissandrini, M., & Hose, K. (2026). Jazero: A Semantic Table Search System. In 2026 IEEE 42nd International Conference on Data Engineering (ICDE) (pp. 4151–4154). IEEE. https://doi.org/10.1109/ICDE65706.2026.00314
  • Optimizing Large Language Models for Robust Domain-Specific Text-to-SQL: From Prompting to Preference Alignment / Hampp, N., Mirylenka, K., & Glass, M. (2026). Optimizing Large Language Models for Robust Domain-Specific Text-to-SQL: From Prompting to Preference Alignment. In Proceedings of the 11th Edition of the Swiss Text Analytics Conference (pp. 64–75). Association for Computational Linguistics.
  • Milosh Jovanovikj: Best Student Research Paper Award
    2026 / Research and Innovation Track at SEMANTiCS 2026 / Belgium / Website
  • Katja Hose: Distinguished Associate Editor Award
    2026 / VLDB Journal / USA / Website
  • Katja Hose: Distinguished Associate Editor Award
    2026 / PVLDB/VLDB 2026 / USA / Website
  • Katja Hose: Best Paper Award
    2025 / European Conference on Advances in Databases and Information Systems (ADBIS) 2025 / Finland / Website
  • Katja Hose: Distinguished Associate Editor Award
    2025 / PVLDB/VLDB 2025 / UK / Website
  • Katja Hose: ACM Senior Membership
    2025 / ACM / USA / Website
  • Katja Hose: Distinguished Meta-Reviewer Award
    2025 / EDBT/ICDT 2025 Joint Conference / Spain / Website
  • Katja Hose: Manfred Paul Award - Extraction of Validating Shapes from very large Knowledge Graphs (VLDB 2023)
    2024 / International Federation for Information Processing (IFIP) / Germany / Website
  • Katja Hose: Best Demo Award - GLENDA: Querying over RDF Archives with SPARQL
    2023 / European Semantic Web Conference (ESWC) 2023 / Greece / Website
  • Katja Hose: Best Paper Award - Automated Ontology Evaluation: Evaluating Coverage and Correctness using a Domain Corpus
    2023 / International Workshop on Natural Language Processing for Knowledge Graph Creation (NLP4KGC) 2023 / USA / Website

Soon, this page will include additional information such as reference projects, conferences, events, and other research activities.

Until then, please visit Data Management’s research profile in TISS .