The fifth Open Science Fair (OSFair), OpenAIRE's flagship biennial event co-organised with the CERN Open Science Office, brought the global Open Science community together at the Science Gateway at CERN in Geneva from 15 to 17 September 2025 for three inspiring days of collaboration and exchange. Held under the theme "Fusing Forces – Accelerating Open Science through Collaboration," the Fair became a vibrant hub of ideas, debate, and innovation - a space where infrastructures, policies, communit...

From paper licences to machine-readable rights The Open Science Fair 2025, hosted at CERN's Science Gateway, brought together leading voices from research infrastructures, funders, and data communities to explore one of the most pressing challenges in the age of AI and federated science: how can we make rights and responsibilities as interoperable as the data they govern? The session "Introducing OpenREL: Rights Expression Languages for Open Science and International Data Spaces – A Practitioner...