What does JSON-LD do in a product passport?
JSON-LD is a W3C Recommendation for linked data in JSON. In a Digital Product Passport, it helps structure terms, entities and relationships so humans, systems and search engines can interpret the same data more consistently.
For DPP pages, this does not mean forcing every product value into Schema.org. The important part is a consistent data model: product, manufacturer, identifier, material, evidence, version and access level need to be connected clearly.
Where do Verifiable Credentials fit?
Verifiable Credentials are a W3C data model for digital evidence. Recommendation 2.0 was published on 15 May 2025 and describes an issuer, holder and verifier ecosystem for machine-verifiable claims.
In product passport work, VCs are especially relevant for evidence: certificates, test reports, supplier declarations or conformity claims can be linked with issuer, validity period, status and verification method over time.
How does Nulara use these standards?
Nulara separates product passport data, evidence documents and verifiable claims. Public product data can be exposed as structured JSON; evidence stays versioned, source-linked and access-controlled when needed.
That separation prevents the product passport from becoming a static PDF or vague marketing page. Machine readability comes from clear entities, stable identifiers, open formats and traceable data origin.
- Use JSON-LD for semantic structure and entity clarity.
- Use credentials only where verifiability and issuer context create real value.
- Model privacy and access rights from the start instead of attaching them later.
Related Nulara Pages
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