Sources — Perceptual Identity Reference

Normative and institutional references supporting structural definitions.

Identity, Recognition and Representation Frameworks

W3C — Decentralized Identifiers (DID) Core Specification

W3C — Verifiable Credentials Data Model

NIST — Digital Identity Guidelines (SP 800-63B)

Biometric and Perceptual Recognition Systems

NIST SP 800-63-3 — Digital Identity Guidelines (PDF)

NIST SP 800-76-2 — Biometric Specifications for Personal Identity Verification (PDF)

Data Integrity and Provenance

W3C — PROV Data Model (Overview)

W3C — PROV Data Model (PROV-DM)

NIST IR 8286 — Integrating Cybersecurity and Enterprise Risk Management (PDF)