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Folgen Sie einem manuell hinzugefügten Link

8.-10. Oktober 2025

7. Internationales
Open Search Symposium
#ossym25

8.-10. Oktober 2025

7. Internationales
Open Search Symposium
#ossym25

Folgen Sie einem manuell hinzugefügten Link

Das #ossym25 setzt die erfolgreiche Konferenzreihe der letzten 6 Jahre fort und bringt 2025 zum siebten Mal die europäische und internationale Open Search Community zusammen.
Das Ziel der interaktiven Konferenz: Ideen und Konzepte einer offenen Internetsuche zu diskutieren und weiterzuentwickeln. Zu den Teilnehmern gehören Forscher, Rechenzentren, Bibliotheken, politische Entscheidungsträger, Rechts- und Ethikexperten und die breite Öffentlichkeit.

  • 8.-10. Oktober 2025

  • Helsinki, Finnland und Online

  • Konferenzsprache: Englisch

  • reguläre Vor-Ort-Teilnahmegebühr: 200,00 €

Die Anmeldung ist ab sofort möglich.

Register here for ossym25
Conference illustration – three stylised people with speech bubbles

Conference Information

Discuss interdisciplinary aspects of Open Search
technical • ethical • legal • educational • economic • applications

Keynotes

Viivi Lähteenoja
Chief Executive Officer, The MyData Company

Harri Ketamo
Founder & Chairman, Headai

… more to be announced soon.

Science Tracks

Crawling and Infrastructure

Search Applications and Technologies

Preprocessing and ML for Search

LLMs and RAG

Sessions + Workshops

  • Ethics + Society
  • Legal aspects of open web search & AI-training
  • Economic aspects of open web search

Industry Track
„Alternative Search Engines“

fragFINN.de
searchmysite.net

Overview timetable

Day 1 | 8 Oct. 25

08:30 | Opening of Registration

09:15 | Conference Opening
Welcome

Kimmo Koski
Managing Director, CSC IT Center for Science

09:30 | Keynote
„Opening Keynote“
tba

10:30 | Coffee Break

11:00 | Science Track
Architecture and Infrastructure I
Session Chair: tba

11:00 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 (DLR); Stefan Voigt (Open Search Foundation)

12:00 | Lunch Break

13:30 | Applications Track
Retrieval Augmented Generation & Large Language Models
Session Chair: tba

13:30 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 Finnish talk – tba
tba

14:30 | Coffee Break

15:00 | Applications Track
AI Tools in Science
Session Chair: tba

15:00 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 Finish talk – tba
tba

16:00 | Workshop on Information Literacy
Melanie Platz (University of Saarland); Carolin Bauer (Open Search Foundation)

17:00 | Closing of Day 1

Day 2 | 9 Oct. 25

9:00 | Science Track
Architecture & Infrastructure II
Session chair: tba

09:00 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 Finnish talk – tba
tba

10:20 | Coffee Break


11:00 | Keynote
„The openness of knowledge data and its role in Future Search Solutions“
Harri Ketamo
Founder & Chairman Headai

12:00 | Lunch Break

14:00 | Applications Track
Retrieval Augmented Generation & Large Language Models
Session chair: tba

14:00 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
Sebastian Gürtl; Felix Holz; Alexander Nussbaumer; Daniel Scharf (Graz University of Technology)

14:40 Fusion of retrieval, grammar rules and decision trees for text generation
Walter Kühn; Svenja Müller; Engelbert Niehaus (RPTU)

15:00 Finnish talk – tba
tba

15.30 | Coffee Break

16:00 | Legal Session
Adressing legal challgenges in Open Web Search
Session chair: tbd

16:00 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
N.N. (Open Search Foundation); Paul Christopher Johannes (University of Kassel)

16:40 | Social Science Track
Ethics & Society I
Session chair: tbd

16:40 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

Day 3 | 10 Oct. 25

9:00 | Keynote
„Data Governance“
Viivi Lähteenoja

Chief Executive Officer, The MyData Company

10:00 | Coffee Break

10:30 | Industry Track
Alternative Search Engines
Session Chair: tbd

10:30 FragFINN
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 
Ethics & Society II
Session Chair: tbd

11:10 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)

11:30 A manifesto for public interest Internet Search
Alexander Nussbaumer (Graz University of Technology); Christine Plote (Open Search Foundation)

12:00 | Closing of #ossym25 & Wrap-Up Lunch

13:30 | End of Symposium

For any changes in the program please check back regularly on the conference website. Or sign-up for our newsletter to stay up to date.

Life Science Center Espoo, Finland

Venue

Life Science Center Keilaniemi
Espoo (Helsinki), Finland

Address

CSC – IT Center for Science Ltd.
Life Science Center Keilaniemi
Keilaranta 14
02150 Espoo

Hotels nearby

Radisson Blu Hotel Espoo (€€)

Heymo1 Sokos Hotels (€€)

Hotels in Helsinki city with good connections

Lapland Hotels Bulevardi (€€€)

Klaus K Hotel (€€)

Omena Hotel Lönnrotinkatu (€)

How to get there

The Life Science Center Keilaniemi is located in Espoo which is about 1o km distance from Helsinki Central Station / city center. The distance from Helsinki-Vantaa airport is approximately 20 kilometres.

From the airport

  • by Taxi (approx. 30 min.)
  • by public transport (approx. 1:10h min.) – take a lokal train or bus from the airport. You need to change at least one time. Varius connections are possible. Please use the Helsinki public transports website to plan you route.

From Helsinki Central Station

Metro line M1 (direction: Kivenlahti) or M2 (direction: Tapiola) – get off at “Keilaniemi”.
Exit the metro station by the exit A (“Keilaniementie”) which is the most convenient one of the two exits.

Taxi Information

  • from the airport to the venue: approx. 30 min.; 30-45 Euro
  • from the city centre to the venue: approx. 15 min.; 15-20 Euro

Airport taxi (fixed prices)

Taxi dispatch center (Prices may vary between operators and depending on the current demand of taxis)

You can also use apps such as Uber and Bolt to book your taxi ride.

The registration for #ossym25 opens June, 15th 2025. The conference programme will be published from spring 2025. To stay up to date, subscribe to the free osf newsletter.

Newsletter Subscription

Important Dates

Submission deadline of full papers and extended abstracts
17 March 2025

Information about contribution acceptance
1 June 2025

Registration for the #ossym25
Will open 15 June 2025

International Open Search Symposium #ossym25
8-10 October 2025

Online publication of proceedings
Autumn 2025

Conference fee

A conference fee applies for #ossym25
regular: 200,00€ I reduced: 60,00€ (students, freelance developers and on special request)

How does the payment procedure work?
Fees will be collected upon registration via Indico/bank transfer (starting June 15th)

Whom to contact if I have special request regarding the fee?

Is there a fee for online participation?
No, online participation is free of charge

Main Topics

Discuss interdisciplinary aspects of Open Search
technical • ethical • legal • educational • economic • applications

Topics of #ossym25 include but are not limited to

  • Open search architectures and platforms
  • Open Web Index and application domains
  • Federated search and cross-domain search
  • Web Data Analytics and Web Mining
  • Natural language and multi-media processing for search
  • Large Language Models, Machine learning and generative AI
  • AI-based search and Retrieval Augmented Generation
  • Personalization and recommendation in search
  • Conversational Retrieval Experiences
  • Georeferencing of web content and geospatial search and analysis
  • Evaluation of open search systems
  • Applications of open search in domains such as science, e-commerce, health, and education
  • Search bias and trust
  • Economic dimensions of open search
  • Search engine advertising and business models in an open search world
  • Green computing and sustainability
  • Societal and ethical challenges and solutions
  • Ethical and value aspects of search
  • Politics and governance
  • Legal aspects
Flüstertüte, Open Search Symposium

Call for Papers

We are calling for your contribution with scientific papers, sharing of practical experiences or by introducing concepts and positions in relevant fields, such as computer science, legal, economics and ethics. Full papers and abstracts presented at the #ossym25 will be published open access in online proceedings (including DOIs and ISBN) following the event.

Please submit your contribution: for research contributions we accept full papers (4-6 pages) and for any other contribution (concepts, best practices or practitioners’ experiences) an extended abstract (1 page).

All abstracts and papers have to be submitted via https://indico.cern.ch/e/OSSYM-2025 using the templates specified there. The acceptance of all full papers and extended abstracts is subject of a peer-review process.

Submit papers (via CERN Indico)

Call for Demos

We invite young researchers and students to showcase their innovative work using the Open Web Index of the OpenWebSearch.eu project. This call is an excellent opportunity for participants to develop and present innovative search and web analytics solutions to advance to a more open search ecosystem and show them to the open search community. We are particularly interested in demonstrations that combine the Open Web Index with technologies such as Large Language Models, Knowledge Graphs, or that offer new search paradigms (e.g. Argumentation Search, Conversational Search), interesting frontends, and domain-specific search solutions. In addition, we are also looking for contributions towards web-scale, robust semantic enrichment techniques that can advance search solutions for different domains. Examples could be information quality assessments, entity extraction or Knowledge Graph alignment.

All demos have to be submitted via https://indico.cern.ch/e/OSSYM-2025 using the templates specified there. The acceptance of all demos is subject of a peer-review process.

Submit demos (via CERN Indico)

In case you want to organize a thematic session or workshop, please contact us with a one page proposal at

Handdrawn Illustration Conference

Speaker Info

Prof. Dr. Martin Andree

Bestselling Author (Big Tech Must Go) + Researcher at the University of Cologne

10 October | Keynote: The Internet of monopolies. How we are taking back the net | 14.00 pm

Prof. Dr. Martin Andree is a media scientist and teaches digital media at the University of Cologne. He has been researching the dominance of digital corporations for more than 15 years and is the author of seven books, including the highly acclaimed „Atlas of the Digital World“, the first „zero measurement“ of digital media use in Germany, as well as the political interpretation in the current book „Big Tech must go!“.
He is a sought-after interview partner, keynote speaker and regularly publishes articles in leading media as a guest author. He completed his studies in Cologne, Münster, Cambridge and Harvard.

Dr. Florian Herrmann

MdL, State Minister
Head of the Bavarian State Chancellery
State Minister for Federal and Media Affairs

9 October | Welcome Speech | 9.00 am

Dr. Florian Herrmann is Head of the Bavarian State Chancellery and State Minister for Federal and Media Affairs.

He is a Member of the Bundesrat for the Free State of Bavaria, a full Member of the Mediation Committee of the German Bundestag and the Bundesrat and a Substitute member of the Joint Committee of the German Bundestag and Bundesrat.

Nina Leseberg, Head of Communities & Engagement Wikimedia Deutschland

Nina Leseberg

Head of Communities & Engagement, Wikimedia Deutschland

11 October | Keynote | 09.00 am

Nina Leseberg has been Head of Communities & Engagement at Wikimedia Deutschland since January 2024. The social scientist helped build up „Deutsche Stiftung für Engagement und Ehrenamt“ (German Foundation for Engagement and Volunteering) as Head of Department for Structural Strengthening and Research, was Deputy Head of the Department for Civic Engagement and Democracy Promotion in the Berlin Senate Chancellery and worked for around ten years at „Bundesverband Deutscher Stiftungen“ (Association of German Foundations).

Wikipedia is a dynamic and constantly growing source of knowledge that is created by a self-organised global community of volunteers. In her keynote „Digital Discourse: how the Wikipedia Community safeguards the quality of the digital encyclopedia“, Nina will shed light on the mechanisms and strategies of the Wikipedia community to ensure the quality of the encyclopaedia while remaining open to new authors and topics.

Dr. Richard Socher

CEO of You.com

10 October | Keynote: You.com | 09.00 am

Richard Socher is the founder and CEO of you.com. Richard previously served as the Chief Scientist and EVP at Salesforce. Before that, Richard was the CEO/CTO of AI startup MetaMind, acquired by Salesforce in 2016. Richard received his Ph.D. in computer science at Stanford. He is widely recognized as having brought neural networks into the field of natural language processing, inventing the most widely used word vectors, contextual vectors and prompt engineering. He has over 180,000 citations and served as an adjunct professor in the computer science department at Stanford.

Dr. Roberto Viola

Director General, Communications Networks, Content and Technology, European Commission

9 October | Opening Keynote | 9.15 am

Roberto Viola is Director General of DG CONNECT (Directorate General of Communication, Networks, Content and Technology) at the European Commission.
He was the Deputy Director-General of DG CONNECT, European Commission from 2012 to 2015.
Roberto Viola served as Chairman of the European Radio Spectrum Policy group (RSPG) from 2012 to 2013, as Deputy Chairman in 2011 and Chairman in 2010. He was a member of the BEREC Board (Body of European Telecom Regulators), and Chairman of the European Regulatory Group (ERG) in 2007.
He held the position of Secretary General in charge of managing AGCOM, from 2005 to 2012. Prior to this, he served as Director of Regulation Department and Technical Director in AGCOM from 1999 to 2004.
From 1985-1999 he served in various positions including as Head of Telecommunication and Broadcasting Satellite Services at the European Space Agency (ESA).
Roberto Viola holds a Doctorate in Electronic Engineering and a Masters in Business Administration (MBA).

Registration

You can register for the conference – for on-site and online participation – via the system of our conference partner CSC. Please note that the participation fee will be charged during the registration process.

Register here for OSSYM25

Organisers & Programme Committee

Organising Committee

Conference Chairs

Prof. Dr. Michael Granitzer | University Passau, Germany
Prof. Dr. Christian Guetl | Graz University of Technology, Austria
Dr. Megi Sharikadze | Leibniz Supercomputing Centre, Munich, Germany
Dr. Stefan Voigt | Open Search Foundation, Starnberg, Germany
Dr. Andreas Wagner | CERN, Geneva, Switzerland

Local Chairs and Organization

Per Öster, PhD | CSC – IT Center for Science, Finland

Publication Chairs 

Sebastian Guertl | Graz University of Technology, Austria
Elias Sandner
| CERN, Geneva, Switzerland
Dr. Andreas Wagner
| CERN, Geneva, Switzerland

Poster Session Chairs 

Iiris Liinamaa | CSC – IT Center for Science, Finland
Heidi Laine | CSC – IT Center for Science, Finland

Programme Committee

Dr. Alexander Decker | Technische Hochschule Ingolstadt, Germany

Prof. Dr. Arjen P. de Vries | Radboud University, Netherlands

Prof. Dr. Kai Erenli | University of Applied Sciences BFI Vienna, Austria

Msc. Maik Fröbe | Friedrich-Schiller-Universität, Jena, Germany

Priv.-Doz Dr. Christian Geminn | University Kassel, Germany

Prof. Dr. Michael Granitzer | University Passau, Germany

Prof. Dr. Christian Guetl | Graz University of Technology, Austria

Prof. Dr. Matthias Hagen | Friedrich-Schiller-Universität, Jena, Germany

Prof. Dr. Denis Helic | Graz University of Technology, Austria

Msc. Gjis Hendriksen | Radboud University, Netherlands

Prof. Dr. Andreas Henrich | University Bamberg, Germany

Prof. Djoerd Hiemstra | University of Twente, Radboud University, Netherlands

Msc. Phil Höfer | SUMA e.V., Germany

Prof. Dr. Robert Jäschke | Humboldt University Berlin & L3S, Hannover, Germany

Prof. Dr. Dieter Kanzlmüller | Ludwigs-Maximilians-University & Leibniz Rechenzentrum, Munich, Germany

Dr. Jens Kersten | German Aerospace Centre, Jena, Germany

Prof. Dr. Elisabeth Lex | Graz University of Technology, Austria

Dr. Jelena Mitrovic | University of Passau, Germany

Prof. Dr. Engelbert Niehaus | University Koblenz-Landau, Landau, Germany

Prof. Dr. Monica Palmirani | Università di Bologna, Italy

Dr. Jakub Piskorski | Joint Research Center (JRC), Ispra, Italy

Prof. Dr. Melanie Platz | Saarland University, Germany

Prof. Dr. Martin Potthast | Leipzig University, Germany

Prof. Dr. Mirko Presser | Aarhus University, Denmark

Prof. Dr. Georg Rehm | German Research Center for Artificial Intelligence (DFKI), Berlin, Germany

Dr. Renée Ridgway | Aarhus University, Denmark

Dr. Tim Smith | CERN, Geneva, Switzerland

Dr. Stefan Voigt | Open Search Foundation, Germany

Dr. Andreas Wagner | CERN, Geneva, Switzerland

Prof. Patrick Weiss | Technische Hochschule Ingolstad, Germany

© Open Search Foundation e. V.
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