New WWTF project: DORSET Project
We are delighted to announce that our project proposal "DORSET: From Structures to Vectors: Decoding How Knowledge Graph Characteristics Shape Embedding Strategies" has been selected for funding. The project is expected to begin in January 2026.
Out of 84 proposals, the Vienna Science and Technology Fund (WWTF) selected 12 projects for support - we’re honored to be among them.
This is a collaborative effort led by Marta Sabou as Principal Investigator, together with Emanuel Sallinger and Katja Hose as Co-Principal Investigators.
Our research will explore how intrinsic properties of knowledge graphs shape the performance of embedding methods. These insights will help design new benchmarks, knowledge engineering tools, and embedding strategies.
September 2025
Best Paper Award at ADBIS 2025 Award
Our work on "Pasteur: Scaling Privacy-aware Data Synthesis" received the Best Paper Award at ADBIS 2025, authors: A. Kapenekakis, D. Dell'Aglio, M. Bøgsted, M. Garofalakis, K. Hose
September 2025
Participation and Presentations at ADBIS 2025 Presentation
Yeasmin Ara Akter and Antheas Kapenekakis presenting their works at ADBIS 2025:
- Y. Akter, A. Abelló, P. Jovanovic, T. Sagi, K. Hose
Evaluating Quality of Disparate Data Sources: A Discord-Driven Approach - A. Kapenekakis, D. Dell'Aglio, M. Bøgsted, M. Garofalakis, K. Hose
Pasteur: Scaling Privacy-aware Data Synthesis
Impressions from the conference:
September 2025
Research Visit by Jitse De Smet Visit
We're happy to share that Jitse De Smet is joining us for a few month to collaborate on topics around querying knowledge graphs.
September 2025
Paper presented at SEMANTiCS 2025 Presentation
Maxime Jakubowski presented the paper "Bridging Gaps in RDF Validation – Insights and Innovation Opportunities in RDF Validation Practices" at SEMANTiCS 2025 in Vienna, Austria, authored by M. Jakubowski, D. Tomaszuk, and K. Hose
September 2025
Distinguished Associate Editor Award at VLDB 2025 Award
Katja Hose has received a Distinguished Area Editor Award at VLDB 2025, held in London.
The award recognizes outstanding contributions to the review process and editorial work for the PVLDB and conference.
September 2025
Participation and Presentations at VLDB 2025 Presentation
Members of the DMKI Lab participate in VLDB 2025 - making the following contributions:
- Dynamic Knowledge Graph-based Measurement of Data Quality
Johannes Schrott, Rainer Meindl, Christian Lettner, Stefan Hammer, Magdalena Leitner
QDB Workshop | Monday, 10:30 AM – 11:30 AM - SmartSPARQL Advisor: Guiding Users in Query Formulation with Performance Prediction
Abiram Moharanaj, Matteo Lissandrini, Katja Hose
Demo Session A2 | Wednesday, 10:45 AM – 12:15 PM - The Limits of Graph Samplers for Training Inductive Recommender Systems
Theis Jendal, Matteo Lissandrini, Peter Dolog, Katja Hose
Research Session 58 | Thursday, 1:45 PM – 3:15 PM - PlanRGCN: Predicting SPARQL Query Performance
Abiram Moharanaj, Matteo Lissandrini, Katja Hose
Research Session 62 | Thursday, 3:45 PM - 5:15 PM
Impressions from the conference:
September 2025
AI 2000 Most Influential Scholar Award 2025 - Honorable Mention Award
Katja Hose has received a 2025 Most Influential Scholar Award - Honorable Mention from AMiner (AI 2000) in recognition of outstanding and vibrant contributions to the field of Knowledge Engineering between 2015 and 2024.
August 2025
PhD Defense of Tobias Zeimetz at Trier University Event
Katja Hose served on the examination committee for the PhD defense of Tobias Zeimetz at Trier University, together with his supervisor Ralf Schenkel.
Tobias successfully defended his dissertation titled “Hybrid and Quality Aware Federations of Linked Data Fragment Interfaces and Traditional RESTful Web APIs”, which systematically addresses key issues at the intersection of Linked Data and Web APIs.
As a fun detail: both committee members even made it onto the traditional Doktorhut. German language skills may help in spotting them!
August 2025
Paper Accepted at IJKGC 2025 Publication
Our paper "RDFGraphGen: An RDF Graph Generator based on SHACL Shapes" by M. Jovanovik, M. Vecovska, Maxime Jakubowski, K. Hose has been accepted for publication in IJKGC 2025.
August 2025
Paper Accepted at VLDB 2025/2026 Publication
Our paper "Exploring Exploratory Querying" by M. Arenas, E. Franconi, J. Hammerer, O. Hartig, K. Hose, L. Koesten, G. Konstantinidis, L. Libkin, W. Martens, Y. Sasaki, S. Scherzinger, K. Thornton, H. Wu has been accepted for publication in VLDB 2025 and presentation in VLDB 2026.
August 2025
Paper Accepted at CIKM 2025 Publication
Our paper "The Yelp Collaborative Knowledge Graph" by T. E. Jendal, M. Corfixen, M. Olesen, P. Dolog, K. Hose, D. Dell'Aglio, and M. Lissandrini has been accepted for publication in the Resource Track at CIKM 2025.
August 2025
VLDB Summer School 2025 Event
Our team members Koumudi Ganepola and Johannes Schrott attended this year's VLDB Summer School at the University of Wrocław in Poland. Besides listening to interesting lectures from top researchers, participants had the opportunity to present their current work in the form of posters.
Impressions from the VLDB Summer School 2025:
August 2025
Paper Accepted at ECML PKDD 2025 Publication
Our paper "Handling New Users and Items: A Comparative Study of Inductive Recommenders" by T. E. Jendal, M. Lissandrini, P. Dolog, and K. Hose has been accepted for publication in Data Mining and Knowledge Discovery and presentation in ECML PKDD 2025.
July 2025
Scientific Visit by Darko Sasanski Visit
Darko Sasanski has joined the DMKI Lab for the next two weeks, as part of his short term scientific mission (STSM) from the GOBLIN COST Action. Darko will be working on the topic of Agentic AI, more specifically on "Exploring Cross-Agent Semantic Interoperability via Embedding Alignment and Graph-Augmented Interaction".
July 2025
Lecture at BILAI Summer School 2025 Talk
Katja Hose gave an introductory lecture on "Knowledge Graphs" at the Bilateral AI Summer School 2025 in Klagenfurt.
July 2025
Paper accepted at the QDB'25 Workshop at VLDB Publication
The paper "Dynamic Knowledge Graph-based Measurement of Data Quality", written by Johannes Schrott, Rainer Meindl, Christian Lettner, Stefan Hammer, and Magdalena Leitner, has been accepted at the QDB’25 workshop, which takes place as part of the 51st VLDB conference.
The paper introduces a novel method that enables the dynamic knowledge graph-based parameterization of data quality metric definitions.
June 2025
Paper accepted at SEMANTiCS 2025 Publication
Our work on "Bridging Gaps in RDF Validation - Insights and Innovation Opportunities in RDF Validation Practices" by Maxime Jakubowski, Dominik Tomaszuk, and Katja Hose has been accepted as a paper at SEMANTiCS 2025.
This work presents the results of our community survey on common practices and uses of shapes for RDF validation.
June 2025
Participation in SIGMOD/PODS 2025 Event
The dbai team had the pleasure of attending SIGMOD/PODS 2025 in Berlin. It was an inspiring conference filled with cutting-edge research, stimulating discussions, and valuable networking opportunities.
We were proud to present three papers at the conference:
- Towards Tractability of the Diversity of Query Answers: Ultrametrics to the Rescue – Marcelo Arenas, Camillo Merkl, Reinhard Pichler, Cristian Riveros
- Soft and Constrained Hypertree Width – Matthias Lanzinger, Cem Okulmus, Reinhard Pichler, Alexander Selzer, Georg Gottlob
- Lossless Transformation of Knowledge Graphs to Property Graphs using Standardized Schemas – Kashif Rabbani, M. Lissandrini, Angela Bonifati, Katja Hose (paper)
Below are a few impressions from our time at the event:
July 2025
Visit by Nelly Barret Visit
We had the pleasure of welcoming Nelly Barret from a Politecnico di Milano during her visit to Vienna for the CAiSE 2025 conference.
Her stop at TU Wien was a wonderful opportunity to exchange ideas and engage in insightful discussion.
June 2025
PhD Defense at UPC Event
We’re pleased to share that Katja Hose served on the examination committee for the PhD defense of Javier Flores at the Universitat Politècnica de Catalunya (UPC) in Barcelona.
Javier’s dissertation was supervised by Sergi Nadal and Oscar Romero.
Congratulations to Dr. Javier Flores on this significant achievement!
June 2025
Paper presented at GOBLIN Workshop 2025 Presentation
Maxime Jakubowski presented our work on "Towards Generating Synthetic EHR Knowledge Graphs — a Probabilistic Approach" at the GOBLIN Workshop 2025 in Leipzig, Germany, authors: M. Jovanovik, E. Milenkova, M. Jakubowski, and K. Hose (paper)
June 2025
Papers accepted at ADBIS 2025 Publication
Two of our works have been accepted at ADBIS 2025:
- "Pasteur: Scaling Privacy-aware Data Synthesis" by Antheas Kapenekakis, Daniele Dell'Aglio, Martin Bøgsted, Minos Garofalakis, Katja Hose
- "Evaluating Quality of Disparate Data Sources: A Discord-Driven Approach" by Yeasmin Akter, Alberto Abelló, Petar Jovanovic, Tomer Sagi, Katja Hose
June 2025
IFIP TC2 Manfred Paul Award 2024 Award
Kashif Rabbani, Matteo Lissandrini, and Katja Hose received the IFIP TC2 Manfred Paul Award for Excellence in Software: Theory and Practice.
The award was given for their paper “Extraction of Validating Shapes from Very Large Knowledge Graphs” published in VLDB 2023 (paper).
June 2025
New Team Member Team
Welcome to our new PhD researcher, Johannes Schrott, who has joined the DMKI Lab in June 2025.
June 2025
PhD Position Available Vacancy
We have new exciting PhD position available in our team in knowledge-graph driven factuality and explainability. Expected starting time: fall 2025, application deadline: July 31, 2025.
More details are available here.
June 2025
Journal Paper Published Publication
Our work on "Applicability Assessment of Technologies for Predictive and Prescriptive Analytics of Nephrology Big Data" by R. Stojanov, M. Jovanovik, S. Gramatikov, I. Mishkovski, E. Zdravevski, D. Sasanski, Z. Karapancheva, G. Spasovski, I. Vasileska, T. Eftimov, W. Zhuojun, J. Jankowski, D. Trajanov has been published in Proteomics.
May 2025
Katja Hose becomes an ACM Senior Member Award
K. Hose has become an ACM Senior Member (ACM website).
May 2025
Demo Paper accepted at VLDB 2025 Publication
Our work on "Smart SPARQL Advisor: Guiding Users in Query Formulation with Performance Prediction" by A. Moharanaj, M. Lissandrini, and K. Hose has been accepted as a demo paper at VLDB 2025.
May 2025
Preprint Available Publication
Our work on "RDFGraphGen: An RDF Graph Generator based on SHACL Shapes" by M. Jovanovik, M. Vecovska, M. Jakubowski, and K. Hose is now available on arxiv.org: preprint.
May 2025
Preprint Available Publication
Our work on "MultiHal: Multilingual Dataset for Knowledge-Graph Grounded Evaluation of LLM Hallucinations" by E. Lavrinovics, R. Biswas, J. Bjerva, K. Hose is now available on arxiv.org: preprint.
May 2025
Paper Accepted at GOBLIN Workshop 2025 Publication
The paper "Towards Generating Synthetic EHR Knowledge Graphs — a Probabilistic Approach" by M. Jovanovik, E. Milenkova, M. Jakubowski, and K. Hose has been accepted for publication at the GOBLIN Workshop 2025.
May 2025
New Horizon Europe MSCA DN Project: ARMADA Project
We’re excited to announce the start of our Horizon Europe MSCA DN project ARMADA, focused on conversational data exploration. The project runs from 2025 to 2029.
May 2025
Paper Accepted at CBMS 2025 Publication
The paper "FHIR Lens: A Graph-Based Approach to Semantic EHR Exploration" by D. Tomaszuk, A. Smajevic, T. Sagi, and K. Hose has been accepted for publication at CBMS 2025 (paper).
May 2025
Paper Accepted at VLDB 2025 Publication
The paper "PlanRGCN: Predicting SPARQL Query Performance" by A. Moharanaj, M. Lissandrini, and K. Hose has been accepted for publication at VLDB 2025 (paper).
April 2025
New Team Member Team
Welcome to our new PhD researcher, Koumudi Ganepola, who has joined the DMKI Lab in April 2025.
April 2025
Paper Accepted at VLDB 2025 Publication
The paper "The Limits of Graph Samplers for Training Inductive Recommender Systems" by T. E. Jendal, M. Lissandrini, P. Dolog, and K. Hose has been accepted for publication at VLDB 2025 (preprint).
April 2025
TARGET Annual Meeting Project
TUW participants K. Hose, M. Jovanovik, T. Sagi, and S. El-Sherbiny attended TARGET's annual consortium meeting in Lund.
March 2025
Talk at EDBT 2025 Industry Event Talk
Katja Hose gave a talk on "Knowledge Graphs: Challenges for GDBMS and AI" at the EDBT 2025 industry event on Next-Generation Data Management Systems.
March 2025
EDBT 2025 Meta-Reviewer Award Award
Katja Hose received a distinguished meta-reviewer award at EDBT 2025.
March 2025
Paper Presented at EDBT 2025 Presentation
Martin P. Christensen presented the paper "Fantastic Tables and Where to Find Them: Table Search in Semantic Data Lakes" at EDBT 2025, authored by M. P. Christensen, A. Leventidis, M. Lissandrini, L. Di Rocco, R. J. Miller, and K. Hose.
March 2025
Paper Presented at EDBT 2025 Presentation
Davide and Matteo presented our work "Towards Reliable Conversational Data Analytics" at EDBT 2025. Authors include S. Amer-Yahia, J. Bogojeska, R. Facchinetti, V. Franceschi, A. Gionis, K. Hose, G. Koutrika, R. Kouyos, M. Lissandrini, S. Maniu, K. Mirylenka, D. Mottin, T. Palpanas, M. Rigotti, and Y. Velegrakis.
March 2025
Keynote at GOBLIN Plenary Keynote
Katja Hose gave a keynote on "Introduction to Knowledge Graphs" at the first GOBLIN plenary meeting in Prague.
February 2025
Participation in GOBLIN's 1st plenary meeting 2025 Event
The dmki team had the pleasure of attending GOBLIN's first plenary meeting in Prague. It was an inspiring meeting with stimulating discussions and networking opportunities.
Maxime Jakubowski presented the first insights on our new SHACL survey evaluating the current state of the art in working with SHACL in industry and academia.
Below are a few impressions from our time at the event:
February 2025
New Team Member Team
Milos Jovanovik has joined the DMKI Lab as a postdoctoral researcher. Welcome!
February 2025
Paper Accepted at the Web Conference 2025 Publication
The paper "Common Foundations of SHACL, ShEx, and PG-Schema" has been accepted at The Web Conference 2025. Authors: S. Ahmetaj, I. Boneva, J. Hidders, K. Hose, M. Jakubowski, J.E.L. Gayo, W. Martens, F. Mogavero, F. Murlak, C. Okulmus, A. Polleres, O. Savkovic, M. Simkus, D. Tomaszuk.
January 2025
Dagstuhl Seminar Participation Event
Katja Hose participated in the Dagstuhl Seminar "Trust and Accountability in Knowledge Graph-Based AI for Self Determination.
January 2025
