Open standards

The standards a passport resolves and validates through.

None of the four is a law. GS1 Digital Link turns a product's GTIN into a resolvable web address; Schema.org Product is the vocabulary that address serves as JSON-LD; product identifiers covers the codes a GTIN is not. A Digital Product Passport needs all four to actually resolve.

The four standards

GS1 Digital Link
Turns a GTIN into a resolvable web address
Schema.org Product + JSON-LD
The vocabulary every public passport page publishes as JSON-LD
GTIN
The identifier a passport's address is built from
Product identifiers
GTIN, SKU, MPN, serial — which one goes in a passport

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The standards a passport resolves and validates through.

The four standards

GS1 Digital Link

Schema.org Product + JSON-LD

GTIN

Product identifiers