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HTTP Representation Variants

Document Type Expired Internet-Draft (httpbis WG)
Expired & archived
Author Mark Nottingham
Last updated 2022-11-30 (Latest revision 2019-11-03)
Replaces draft-nottingham-variants
RFC stream Internet Engineering Task Force (IETF)
Intended RFC status (None)
Additional resources Mailing list discussion
Stream WG state Parked WG Document
Associated WG milestone
Submit HTTP Representation Variants
Document shepherd (None)
IESG IESG state Expired
Consensus boilerplate Unknown
Telechat date (None)
Responsible AD (None)
Send notices to (None)

This Internet-Draft is no longer active. A copy of the expired Internet-Draft is available in these formats:


This specification introduces an alternative way to select a HTTP response from a cache based upon its request headers, using the HTTP "Variants" and "Variant-Key" response header fields. Its aim is to make HTTP proactive content negotiation more cache-friendly.


Mark Nottingham

(Note: The e-mail addresses provided for the authors of this Internet-Draft may no longer be valid.)