Persistent Unique Identifiers (PIDs) are globally unique, persistent, machine-resolvable digital identifiers with an associated metadata schema.

How to Use PIDs: They link researchers and research outputs to their underlying data and associated metadata

Persistent Identifiers covered in this guide:

• Digital Object Identifier (DOI)
• ISBN
• ISSN
• ORCID

Special thanks to Jesse Long (https://transportation.libguides.com/persistent_identifiers), Jennifer Muilenburg (https://guides.lib.uw.edu/research/PID), and Anna Neatrour (https://campusguides.lib.utah.edu/identifiers) for permission to use text from their Libguides on persistent identifiers.