HTTP Representation Variants

Document Type Expired Internet-Draft (httpbis WG)
Author Mark Nottingham 
Last updated 2020-05-06 (latest revision 2019-11-03)
Replaces draft-nottingham-variants
Stream Internet Engineering Task Force (IETF)
Intended RFC status (None)
Expired & archived
pdf htmlized (tools) htmlized bibtex
Stream WG state WG Document (wg milestone: - Submit HTTP Represen... )
Document shepherd No shepherd assigned
IESG IESG state Expired
Consensus Boilerplate Unknown
Telechat date
Responsible AD (None)
Send notices to (None)

This Internet-Draft is no longer active. A copy of the expired Internet-Draft can be found at


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.)