The NKOS workshop at TPDL 2026 will be held at the 30th International Conference on Theory and Practice of Digital Libraries (TPDL 2026), 22–25 September 2026, in Faro, Portugal. This in-person workshop draws on the long-standing contributions of the NKOS (Networked Knowledge Organization Systems) workshop series in advancing research in Knowledge Organization Systems (KOS) and the pivotal role of the TPDL conference in shaping the digital libraries landscape.

The workshop has the following objectives:
To explore the current and future potential of KOS in the context of AI, Linked Data, and multilingual knowledge representation.
To provide an opportunity to discuss ongoing projects, research and development activities, evaluation approaches, and research findings.
To enable major projects to report results and allow newcomers to interact with established researchers and practitioners in the field.
To facilitate discussion on topical issues requiring consensus or coordination, including standards efforts.
To engage with related communities including those working on information retrieval, Semantic Web technologies, digital humanities, and AI, and investigate potential collaboration.
To identify emerging research agendas at the intersection of KOS and contemporary AI-powered information systems.

See https://nkos-eu.github.io/2026/NKOS2026-TPDL-CFP.html

https://easychair.org/cfp/nkos-tpdl2026

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Workshop Themes
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KOS Mappings and Alignment
User Interaction with KOS in Retrieval
Automatic/AI KOS-based subject indexing, classification, and entity extraction
KOS-based recommender systems
Meaningful concept display and visualisation of KOS
Semantic standards developments (including BSI, ISO, W3C SKOS, and related)
Evaluation of KOS-based systems — methods and practical experience
KOS in e-research and metadata contexts
KOS and e-learning
Use of KOS in generative AI applications — methods and practical experience
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Submission
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Proposals are invited for 20-minute presentations and demos or 60-minute panels on work related to the themes of the workshop (above). We welcome presentations, demos and panels related to themes, in-process projects, and ongoing work.

Please submit proposals: maximum 1000 words including aims, methods, background, main findings, and relevance to themes of workshop

EasyChair https://easychair.org/conferences/?conf=nkostpdl2026

Proposals will be peer-reviewed by the Program Committee.
Papers developed from some earlier workshop presentations were published as special issues in journals such as Journal of Data and Information Science and Knowledge Organization. In case of interest, we shall aim for special journal issue to host papers from the 2026 workshop.

Submission deadline (extended): 19 June 2026
Notification of acceptance: 17 July 2026

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Registration & Accommodation
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Participation in in-person workshop will require registration; please consult the TPDL 2026 website for registration and cost information. After the workshop, copies the presentations will be made available on the NKOS website.

TPDL 2026 registration is open at https://tpdl2026.ualg.pt/registration/

Details on the conference venue are available at https://tpdl2026.ualg.pt/venue/

We’re looking forward to meeting you in Faro!

The NKOS Organising Committee