A persistent identifier, or short PID, is a unique alphanumeric code that makes it possible to uniquely and sustainably reference objects, persons and organizations. Importantly, a PID is linked to descriptive information (metadata) about the resource, thereby providing context information. The use of PIDs is growing steadily and is being extended to more and more areas of research, for example through the development of PIDs for samples, data management plans or research projects.

Hence, a growing variety of resource types/entities are covered by PIDs. Among them are: research data, instruments, cultural objects, data management plans, organisations, projects, persons, physical objects (samples), publication services and repositories, research information systems, research tools (such as electronic lab notebooks), scientific events, software, text publications. The use of PIDs is an essential component for the implementation of the FAIR principles that promote the findability, accessibility, interoperability and re-usability of research data. The mandatory and standardized metadata associated with PIDs make research data findable, accessible and citable.

You can learn more about PIDs, their use cases and technical implementation at our partners PID Network Germany and the PID Competence Center of TIB. Or watch this introductory video The power of PIDs by the FREYA project:

• Support for PID implementation and selection, with information on best practices, standards, and training for the NFDI.
• Metadata Quality Assessment
• Standards and Best Practices
• Training and Support
• Governance Support

• And more