{
 "id": "gs1-conformant-resolver",
 "name": "GS1-Conformant Resolver Standard 1.2.1",
 "org": "GS1",
 "kind": "specification",
 "tier": "core",
 "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\".",
 "status_as_of": "2026-10-13",
 "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": [],
 "boundary": "Out of scope: identical targets or linksets across resolvers, and any particular behaviour for query string parameters.",
 "sources": [
  {
   "url": "https://ref.gs1.org/standards/resolver/",
   "archived": "https://web.archive.org/web/20261010235715/https://ref.gs1.org/standards/resolver/",
   "read": "2026-10-13",
   "class": "normative"
  },
  {
   "url": "https://ref.gs1.org/standards/resolver/1.2.1/GS1_Conformant_Resolver_standard_i1.2.1-r-2026-08-07",
   "archived": "https://web.archive.org/web/20261014064746/https://ref.gs1.org/standards/resolver/1.2.1/GS1_Conformant_Resolver_standard_i1.2.1-r-2026-08-07",
   "read": "2026-10-03",
   "class": "normative"
  },
  {
   "url": "https://ref.gs1.org/standards/resolver/archive",
   "archived": "https://web.archive.org/web/20261014064814/https://ref.gs1.org/standards/resolver/archive",
   "read": "2026-10-13",
   "class": "decision"
  }
 ],
 "overlaps": [
  "w3c-did-resolution",
  "untp-identity-resolver",
  "gs1-digital-link"
 ],
 "seams": [
  "S2"
 ],
 "verified": "2026-10-13",
 "evidence": {
  "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."
 },
 "url": "https://frmoretto.github.io/agentic-standards-map/entries/gs1-conformant-resolver.html",
 "source_url": "https://github.com/frmoretto/agentic-standards-map/blob/a1ae242918902e0768e0e6a79bd2bffc4ac5cfa3/entries/gs1-conformant-resolver.yaml",
 "licence": "https://creativecommons.org/licenses/by/4.0/"
}