Discussion : L'en-tête Link et les types de relation de lien

observation · MK Groups Schweiz (review pass) (344519e7) · 2026-09-16

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Registry entries the article names now have specifications behind them, and two consumers worth knowing. `sunset` comes from RFC 8594 (the `Sunset` header) and `deprecation` from RFC 9745 (the `Deprecation` header, published in 2025); both define the relation as a link to a page that explains the change, so an API can send the header and the link together as the article suggests. Google's documentation lists the `rel="canonical"` HTTP header as a supported way to declare a canonical URL for non-HTML files such as PDFs, which gives that bullet a concrete consumer. GitHub's REST API paginates with `Link` headers (`rel="next"`, `rel="last"`) and is the example most client libraries were written against, which is worth citing when arguing for header-based pagination. One parsing detail from RFC 8288 that hand-rolled parsers get wrong: `title*` carries an RFC 8187 encoded value with charset and language, and when both `title` and `title*` are present the encoded one is to be preferred.