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OSSYM 2025 - 7th International Open Search Symposium

from Wednesday 8 October 2025 (08:30) to Friday 10 October 2025 (17:20)
IT Centre for Science - CSC, Helsinki, Finland

        : Sessions
    /     : Talks
        : Breaks
8 Oct 2025
9 Oct 2025
10 Oct 2025
AM
08:30 --- Opening of Registration ---
09:00
Conference Opening - Kimmo Koski (Managing Director, CSC IT Center for Science); Aura Salla (MEP) (until 10:30)
09:00 Conference Opening & Opening Keynote  
09:01 Welcome - Kimmo Koski (Managing Director, CSC IT Center for Science)  
09:15 Welcome Address (pre-recorded) - Henna Virkkunen (Executive Vice-President Tech Sovereignty, Security and Democracy of the European Commission)  
09:30 Keynote „Opening Keynote“ - Aura Salla (MEP)  
10:30 --- Coffee Break ---
11:00
Science Track - Session Chair: Jason Theodoropoulos (CSC – IT Center for Science) (until 12:00)
11:00 Science Track "Architecture and Infrastructure I" - Session Chair: Jason Theodoropoulos (CSC – IT Center for Science)  
11:01 Architecting the Data Storage for the URL Frontier for OpenWebSearch.EU - Noor Afshan Fathima; Andreas Wagner (CERN)  
11:20 Extracting and Utilizing Structured Data from the Open Web Index - Laura Caspari; Michael Dinzinger; Michael Granitzer; Jelena Mitrovic (University of Passau)  
11:40 Towards the Extraction of Location References and Topics from Semi-Structured Textual Data from the Open Web Index using Open-Source Large Language Models - Patryk Gadziomski; Magnus Pfeffer (HdM Stuttgart); Vanessa Rittlinger; Stefan Voigt (DLR)  
09:00
Science Track - Session chair: Sebastian Heineking (University of Leipzig & WEBIS Group) (until 10:20)
09:00 Science Track Architecture & Infrastructure II - Session chair: Sebastian Heineking (University of Leipzig & WEBIS Group)  
09:01 Large-Scale Graph Visualisation of Open Web Index and its Evolution in Time - Kateřina Slaninová; Pavlína Smolková (VSB – Technical University of Ostrava)  
09:20 Expanding the Language and Cultural Coverage of Common Crawl - Pedro Ortiz Suarez; Greg Lindahl; Thom Vaughan; Sebastian Nagel (Common Crawl Foundation)  
09:40 Efficient Session Search using Topical Index Shards - Gijs Hendriksen; Djoerd Hiemstra; Arjen P. de Vries (Radboud University, Nijmegen, The Netherlands)  
10:00 Practical Guide to LLM Finetuning on LUMI Using Data From The Open Web Index - Emma Hintsala (CSC – IT Center for Science)  
10:20 --- Coffee Break | Exhibition ---
11:00
Keynote “The openness of knowledge data and its role in Future Search Solutions” - Harri Ketamo Founder & Chairman Headai (until 12:00)
11:00 Keynote: “The openness of knowledge data and its role in Future Search Solutions” - Harri Ketamo Founder & Chairman Headai  
09:00
Keynote - Viivi Lähteenoja (Chief Executive Officer, The MyData Company & Doctoral Researcher at the University of Helsinki) (until 10:00)
09:00 Keynote: "Searching for Trust: Reflections on Epistemic Virtue Online" - Viivi Lähteenoja (Chief Executive Officer, The MyData Company & Doctoral Researcher at the University of Helsinki)  
10:00 --- Coffee Break ---
10:30
Industry Track - Session Chair: Elias Sandner (CERN) (until 11:10)
10:30 Industry Track - Alternative Search Engines - Session Chair: Elias Sandner (CERN)  
10:31 The children’s search engine fragFINN – best practice for a safe start online - Tanja Gottsmann; Maria Wiesner; Nadine Berneis; FragFINN.de  
10:50 The economics of running an independent search engine - Michael I Lewis, Owner & Operator searchmysite.net  
11:10
Science Track - Session Chair: Ines Zelch (University of Leipzig) (until 12:10)
11:10 Science Track "Ethics & Society II" - Session Chair: Ines Zelch (University of Leipzig)  
11:11 “Exploring Technoscience in the Public Sphere: Opportunities through Open Web Search “ - Emanuele Di Buccio (University of Padova)  
11:30 "The Project KIsu: AI-based searching and finding – easy, inclusive, and self-determined" - Melanie Platz; Kristin Altmeyer; Mirella Hladky; Kerstin Reese; Lisa Schick; Verena Wolf (University of Saarland); Christine Plote (Open Search Foundation); Tanja Gottsmann; Maria Wiesner (FragFINN)  
11:50 A Charter for Public Interest Internet Search - Alexander Nussbaumer (Graz University of Technology); Christine Plote (Open Search Foundation)  
PM
12:00 --- Lunch Break ---
13:30
Applications Track - Session Chair: Noor Afshan Fathima (CERN) (until 14:30)
13:30 Applications Track "Retrieval Augmented Generation & Large Language Models" - Session Chair: Noor Afshan Fathima (CERN)  
13:31 LLM-Assisted Expansion of Patent and Scholarly Literature Knowledge Graphs - Andre Rattinger; Christian Gütl (Graz University of Technology)  
13:50 In-Browser Agentic Web: a Decentralized Approach to Information Access - Saber Zerhoudi; Michael Granitzer (University of Passau)  
14:10 Assessing the Reliability of Human and LLM-Based Screening in Systematic Reviews: A Study on First-Time Reviewers - Elias Sandner, Igor Jakovljevic, Daniel Scharf, Andre Henriques, Andreas Wagner (CERN), Christian Gütl, Thomas Wautischar, (Graz University of Technology, Graz, Austria), Alice Simniceanu, Luca Fontana (WHO)  
14:30 --- Coffee Break ---
14:30 Guided tour at IQM Quantum Computers (optional / parallel to Coffee Break & start of next session)  
15:00
Science Track: "Search Applications and Technologies II" (until 16:00)
15:00 Applications Track "AI Tools in Science" - Session Chair: Saber Zerhoudi (University of Passau)  
15:01 Automating Systematic Reviews: API-Powered Bibliographic Data Retrieval Module for NeutrinoReview - Elias Sandner; Ivan Iličić (Graz University of Technology); Alice Simniceanu (WHO); Luca Fontana; Andre Henriques; Andreas Wagner (CERN); Christian Gütl (Graz University of Technology)  
15:20 Using the Open Web Index to create new search applications for Research.fi - Jason Theodoropoulos; Joonas Kesäniemi (CSC – IT Center for Science)  
15:40 Automating License-Aware Full-Text Retrieval for Systematic Reviews: An End-To-End Scalable System to Reduce Reviewer Workload - Dmytro Zhuk (University of Vienna); Elias Sandner; Igor Jakovljevic; Andre Henriques; Andreas Wagner (CERN); Christian Gütl (Graz University of Technology), Alice Simniceanu, Luca Fontana (WHO)  
16:00
Workshop on Information Literacy - Melanie Platz (University of Saarland); Carolin Bauer (Open Search Foundation) Prof. Melanie Platz (until 17:00)
16:00 Workshop on Information Literacy - Melanie Platz (University of Saarland); Carolin Bauer (Open Search Foundation)  
17:00
Closing of Day 1 (until 17:15)
17:00 Closing of Day 1  
17:15
Evening reception at CSC (until 19:00)
20:00 Optional afterwork meet-up (self-hosted)  
12:00 Introducing LUMI AI Factory (optional / parallel to lunch break)  
12:00 --- Lunch Break ---
14:00
Applications Track Retrieval Augmented Generation & Large Language Models - Session chair: Gijs Hendriksen (Radboud University) (until 15:30)
14:00 Applications Track: "Retrieval Augmented Generation & Large Language Models" - Session chair: Gijs Hendriksen (Radboud University)  
14:01 Scientific Question Answering using Hybrid Retrieval Augmented Generation - Tobias Hecking; Roxanne el Baff (German Aerospace Center – DLR)  
14:20 Adding Retrieval Augmented Generation to the MOSAIC Framework - Alexander Nussbaumer (Graz University of Technology)  
14:40 Fusion of retrieval, grammar rules and decision trees for text generation - Engelbert Niehaus Walter Kühn; Svenja Müller; Engelbert Niehaus (RPTU)  
15:00 Large models for small languages - Sampo Pyysalo (OpenEuroLLM)  
15:15 Curation and preprocessing of training data for open European language models - Markus Koskela; Maciej Janicki (OpenEuroLLM)  
15:30 --- Coffee Break ---
16:00
Legal Session - Session chair: Kai Erenli (University of Applied Sciences BFI Vienna) (until 16:40)
16:00 Addressing legal challenges in Open Web Search - Session chair: Kai Erenli (University of Applied Sciences BFI Vienna)  
16:01 Legal challenges for the Open Web Index and Search Engine Use - Paul Christopher Johannes; Huda Koulani (University of Kassel)  
16:20 Legal Aspects of AI training and Retrieval Augmented Generation - Charlotte Werther (Open Search Foundation); Paul Christopher Johannes (University of Kassel)  
16:40
Social Science Track "Ethics & Society I" - Session chair: Roxanne El Baff (Bauhaus University Weimar, German Aerospace Center – DLR) (until 17:20)
16:40 Social Science: "Track Ethics & Society I" - Session chair: Roxanne El Baff (Bauhaus University Weimar, German Aerospace Center – DLR)  
16:41 Knowledge Sovereignty in Disability Information Retrieval: Architecting Privacy-Preserving and Sustainable Infrastructure - Noor Afshan Fathima; Andreas Wagner (CERN)  
17:00 Building the Open Web Search Community (And Keeping It Growing) - Ursula Gmelch (Open Search Foundation)  
17:20
Closing of Day 2 (until 17:35)
18:30 --- Socialising Event – Allas Restaurants, Helsinki Sauna and swimming available at Allas Sea Pool ---
12:10
Closing of #ossym25 & Wrap-Up (until 12:30)
12:10 Closing of #ossym25 & Wrap-Up  
12:29 End of Symposium  
12:30 --- Lunch ---
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