This year we are partnering again with the SEMANTiCS, an established knowledge hub which brings together technology professionals, industry experts, and researchers to exchange knowledge regarding new technologies, innovations, and enterprise implementations in the fields of Linked Data and Semantic AI. The DBpedia Day is part of the conference and will be held on the first day of SEMANTiCS 2025 on the 3rd of September in Vienna, Austria.

Quick Facts

• Web URL: https://2025-eu.semantics.cc/page/dbpedia
• CfP: https://www.dbpedia.org/blog/dbpedia-day-2025/
• Submission Form: https://forms.gle/6KNBMuRsyXs8RiD89
• Hashtag: #DBpediaDay
• Date: September 3, 2025
• Where: Hilton Vienna Waterfront, Handelskai 269, 1020 Vienna, Austria
• Registration: https://2025-eu.semantics.cc/page/registration

Keynote

Keynote “The QLever SPARQL Engine” by Hannah Bast, University of Freiburg

abstract: SPARQL Engines, also known as RDF databases or triples stores, are the systems we use for storing and querying RDF data. The number of these systems is ever increasing and there is a lot of confusion about which of these systems performs how well for which queries. In the presentation, I will show that the performance differences are huge. I will explain some of the design principles, algorithmic choices, and implementation feats that are responsible for these differences. In particular, I will present QLever, a relatively new engine that beats established engines by a margin, especially on large knowledge graphs with billions, tens of billions, or even hundreds of billions of triples. I will show many examples and demos from a variety of domains. The talk will be understandable for everyone.

Registration / Tickets

DBpedia members get free admission. Please contact your nearest DBpedia chapter for a promotion code, or contact the Head of Organisational Development of the DBpedia Association Julia Holze.

Acknowledgements

	SEMANTiCS 2025 for having the DBpedia Day as part of the conference.
	Institute for Applied Informatics for supporting the DBpedia Association.
	OpenLink Software for continuous hosting of the main DBpedia Endpoint.

Organisation

• Julia Holze, InfAI, DBpedia Association
• Milan Dojchinovski, InfAI, DBpedia Association, CTU
• Sebastian Hellmann, InfAI, DBpedia Association

Program

Please open the links to the presentation slides in a new browser window.