Digital Persistent Identifier or Persistent Identifier (PID)

A digital identifier that is globally unique, persistent, machine resolvable and processable, and has an associated metadata schema. Generally, a long-lasting, managed, and registered unique digital reference (often in the form of a URL) to a research object that can be represented or described online. PIDs are often associated with people, organizations, funding, and STI. Common PIDs include ORCID iDs (for people), ROR IDs (for organizations), and DOIs (for R&D outputs and awards).