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GS1-Conformant Resolver Standard 1.2.1

GS1specificationcore entry

Verified 2026-10-13. Status as of 2026-10-13. All entries.

Seams: S2

Status

Release 1.2.1 ratified August 2026 (standards page and PDF print no day); the archive page on ref.gs1.org lists "Published 19 August 2026".

Relevance

The standard defines how a GS1 Digital Link URI, which carries a product or location key such as a GTIN or a Global Location Number (GLN), is resolved to related information sources. The query string "carries attributes of the identified entity and does not form part of the entity's identifier"; for an invalid request URI "the resolver SHALL respond with an HTTP response code of 400 (Bad Request)", and for a valid URI with no information it "SHALL return a simple 404 Not Found response" (sections 2.12, 2.4.1).

A conformant resolver publishes a Resolver Description File at /.well-known/gs1resolver.

Committed next

None declared in the sources read.

Boundary

Out of scope: identical targets or linksets across resolvers, and any particular behaviour for query string parameters.

Sources

Overlaps

W3C DID Resolution, UN Transparency Protocol, Identity Resolver, GS1 Digital Link Standard, URI Syntax 1.7.0

Neighbours in the map

Neighbours of GS1-Conformant Resolver Standard 1.2.1 in the map Each circle is an entry of the map and links to its page; the colour is the kind of body behind it, a filled circle is a core entry and a dashed circle a context entry. The entry in the middle, with the entries it overlaps and the entries named by the same seams. Overlaps (6)Share a seam (6)W3C DID Resolution (W3C, core)W3C DID Resolution GS1 Digital Link Standard, URI Syntax 1.7.0 (GS1, context)GS1 Digital Link Standa… UN Transparency Protocol, Identity Resolver (UN/CEFACT, core)UN Transparency Protocol CEN/CENELEC JTC 24 Digital Product Passport standards (EN 18216 to EN 18246) (Other standards bodies, core)CEN/CENELEC JTC 24 Digi… schema.org open issues relevant to agents, bookings, product and establishment identity (Independent, core)schema.org open issues… schema.org vocabulary for products, offers, sellers and lodging (current release) (Independent, context)schema.org vocabulary f… W3C/GS1 Workshop on E-commerce for Humans and AI Agents (Zurich, 8-9 Sep 2026) (W3C, core)W3C/GS1 Workshop on E-c… S2 UN Global Trust Register, namespace urn:gtr (UN/CEFACT, context)UN Global Trust Register S2 AI Catalog (Agent Card Working Group) (Linux Foundation, core)AI Catalog S2 x402 (Linux Foundation, core)x402 S2 Agentic Commerce Protocol (ACP) (Industry, core)Agentic Commerce Protoc… S2 Universal Commerce Protocol (UCP) (Industry, core)Universal Commerce Prot… S2 GS1-Conformant Resolver Sta…

Solid lines: overlaps declared by one of the two entries. Dashed lines, coloured by seam: entries named by the same seam (S1 to S4) in the seams note. Every node is a link.

Evidence and coverage

Read
Standards page, PDF (text extracted) and archive page of the Resolver, in full, 2026-10-03; for dates also the URI Syntax standard page and archive.
Not read
The www.gs1.org standards page.