persistent identifier
long-lasting digital name
International Standard Book Number
unique numeric book identifier
Persistent Uniform Resource Locator
OCLC-designed persistent identifier scheme
Participant Identification Code
persistent identifier for an organization
decentralized identifier
identifier that enables a verifiable, decentralized digital identity
Archival Resource Key
multi-purpose persistent identifier for information objects of any type
Research Resource Identifier
persistent and unique identifier for referencing a research resource
Research Organisation Registry
community-led database of research institutions
URN
Uniform Resource Identifier (URI) that uses the urn scheme
unique identifier
identifier which is unique and permanent within a subset of space and time
Standard Book Number
predecessor to ISBN for identifying published books
digital object identifier
ISO standard unique string identifier for a digital object