RFC 8942: HTTP Client Hints

HTTP defines proactive content negotiation to allow servers to select the appropriate response for a given request, based upon the user agent's…

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Outgoing relationships (7 related RFCs)

Normative reference — RFC 2119: Key words for use in RFCs to Indicate Requirement Levels
Normative reference — RFC 8174: Ambiguity of Uppercase vs Lowercase in RFC 2119 Key Words
Normative reference — RFC 5234: Augmented BNF for Syntax Specifications: ABNF
Normative reference — RFC 7231: Hypertext Transfer Protocol (HTTP/1.1): Semantics and Content
Normative reference — RFC 3864: Registration Procedures for Message Header Fields
Normative reference — RFC 7234: Hypertext Transfer Protocol (HTTP/1.1): Caching
Informative reference — RFC 6265: HTTP State Management Mechanism