Welcome and introduction

• Romain David (ERINHA)

OSCARS brings together Europe’s five Science Clusters to support the adoption of FAIR and Open Science practices across research communities. This opening session will briefly introduce the project and explain why a coherent PID strategy helps make research outputs easier to discover and cite, while supporting interoperability and reuse. It will also outline the webinar’s objectives and programme: sharing practical recommendations and experiences from different communities, and discussing the design of a checklist to help projects develop their own PID strategies. Participants will be encouraged to bring their questions and implementation challenges to the discussion.

Building a PID strategy: from principles to practice

• Rorie Edmond (RAID Organisation (to be confirmed))
• Romain David (ERINHA)

- Introduction to the OSCARS practical guide - A minimum viable PID strategy: what every project should consider - Choosing community-recognised PID solutions - Connecting PIDs and avoiding common implementation pitfalls

PIDs, metadata and interoperability in Zenodo

• Giovanni Guerrieri (CERN)

This session will explore how Zenodo uses persistent identifiers and rich metadata to support the discovery, citation and reuse of research outputs. It will highlight how PIDs can connect research outputs with researchers, organisations and projects, contributing to a more interoperable research ecosystem. The presentation will also discuss metadata practices, interoperability challenges and the role of repositories in building a connected PID ecosystem. **Zenodo website:** https://zenodo.org/ **Key points:** - Why metadata matters as much as the identifier - From individual PIDs to a connected PID Graph connecting projects, people, organisations and research outputs - Community practices and interoperability

PIDs in Astronomy: The Good, the Bad and the Ugly

• Baptiste Cecconi (Laboratoire d’Instrumentation et de Recherche en Astrophysique (LIRA))

With several decades of experience in persistent identification, astrophysics offers valuable lessons for research communities where these practices are more recent. PID systems form an essential backbone for sharing and connecting information across its data-intensive ecosystem. This presentation will examine both the strengths of these established practices and the problems that persist today, highlighting the challenges of maintaining reliable identifiers and interoperable links as data volumes, services and scientific needs evolve.

A community use case: beyond conventional identification [BIO-CODES project]

• Sylvia E. Le Dévédec (Leiden University, Leiden Academic Centre for Drug Research)

This session will introduce BIO-CODES, an OSCARS-funded project exploring the use of content-based identifiers to enhance the AI-readiness of bioimaging data. Unlike conventional PID systems, content-based identifiers are derived from the data itself, offering complementary approaches to data identification, traceability and integrity. The presentation will discuss how these approaches can work alongside established PID solutions, their potential benefits for provenance and reproducibility, and the opportunities and challenges they raise in data-intensive research environments. **Project:** BIO-CODES – Enhancing AI-Readiness of Bioimaging Data with Content-Based Identifiers https://oscars-project.eu/projects/bio-codes-enhancing-ai-readiness-bioimaging-data-content-based-identifiers https://www.linkedin.com/in/sylvia-le-d%C3%A9v%C3%A9dec-a4b743a/ **Key points:** - Content-based identifiers for bioimaging data - Complementarity with established PID approaches - Provenance, integrity and AI-readiness

Open discussion and Q&A

• Paul Millar (moderator) (DESY)

Participants are invited to share their questions, experiences and practical challenges in selecting and implementing PID solutions. The discussion will explore metadata requirements, long-term sustainability and interoperability, drawing on the needs and perspectives of different research projects and communities. A central aim will be to identify and prioritise the key elements of a PID strategy checklist that projects can readily adopt and adapt to their own context. Participants’ contributions will help clarify common requirements, discuss choices that depend on the research context, and identify where further practical guidance is needed. **Key points:** - Challenges encountered by research projects - Selecting and implementing appropriate PID solutions - Metadata, sustainability and interoperability challenges - Questions and experiences from the community - Key elements to prioritise for an adaptable and adoptable PID strategy checklist

Wrap up, session feedback and closing

• Romain David (ERINHA)

- Was the webinar useful for your project? - Was the balance between presentations and time for discussions right? If not, in which direction should it be changed, presentation or discussion? - What should be improved? - Which topics need further guidance or training? - Suggested follow-up activities