Technical reference
Standards & technology
The technical building blocks of the EU Digital Product Passport. This section is for architects, developers and data stewards implementing the DPP on top of CIRPASS, GS1 Digital Link and W3C standards.
Data model
CIRPASS reference model, JSON-LD schemas, versioning policy.
Data carriers
QR, Data Matrix, NFC, RFID — trade-offs and durability.
GS1 Digital Link
Turning identifiers into web-resolvable URLs.
DIDs & Verifiable Credentials
Self-sovereign identifiers and signed attestations.
APIs
Read, write, discovery, authentication patterns.
Security & trust
Signatures, trust lists, tamper-evidence.
Accessibility
DPP UX, WCAG 2.1 AA, multilingual concerns.
Open-source tools
CIRPASS, Catena-X, Tracifier and more.
Standards bodies
CEN-CENELEC JTC 24, ISO TC 323, ETSI — and their active work items.