draft-ietf-httpbis-cache-11.txt		draft-ietf-httpbis-cache-latest.txt
	HTTP Working Group R. Fielding, Ed.		HTTP Working Group R. Fielding, Ed.
	Internet-Draft Adobe		Internet-Draft Adobe
	Obsoletes: 7234 (if approved) M. Nottingham, Ed.		Obsoletes: 7234 (if approved) M. Nottingham, Ed.
	Intended status: Standards Track Fastly		Intended status: Standards Track Fastly
	Expires: February 28, 2021 J. F. Reschke, Ed.		Expires: March 21, 2021 J. Reschke, Ed.
	greenbytes		greenbytes
	August 27, 2020		September 17, 2020
	HTTP Caching		HTTP Caching
	draft-ietf-httpbis-cache-11		draft-ietf-httpbis-cache-latest
	Abstract		Abstract
	The Hypertext Transfer Protocol (HTTP) is a stateless application-		The Hypertext Transfer Protocol (HTTP) is a stateless application-
	level protocol for distributed, collaborative, hypertext information		level protocol for distributed, collaborative, hypertext information
	systems. This document defines HTTP caches and the associated header		systems. This document defines HTTP caches and the associated header
	fields that control cache behavior or indicate cacheable response		fields that control cache behavior or indicate cacheable response
	messages.		messages.
	This document obsoletes RFC 7234.		This document obsoletes RFC 7234.
	skipping to change at page 1, line 36 ¶		skipping to change at page 1, line 36 ¶
	This note is to be removed before publishing as an RFC.		This note is to be removed before publishing as an RFC.
	Discussion of this draft takes place on the HTTP working group		Discussion of this draft takes place on the HTTP working group
	mailing list (ietf-http-wg@w3.org), which is archived at		mailing list (ietf-http-wg@w3.org), which is archived at
	<https://lists.w3.org/Archives/Public/ietf-http-wg/>.		<https://lists.w3.org/Archives/Public/ietf-http-wg/>.
	Working Group information can be found at <https://httpwg.org/>;		Working Group information can be found at <https://httpwg.org/>;
	source code and issues list for this draft can be found at		source code and issues list for this draft can be found at
	<https://github.com/httpwg/http-core>.		<https://github.com/httpwg/http-core>.
	The changes in this draft are summarized in Appendix C.12.		The changes in this draft are summarized in Appendix C.13.
	Status of This Memo		Status of This Memo
	This Internet-Draft is submitted in full conformance with the		This Internet-Draft is submitted in full conformance with the
	provisions of BCP 78 and BCP 79.		provisions of BCP 78 and BCP 79.
	Internet-Drafts are working documents of the Internet Engineering		Internet-Drafts are working documents of the Internet Engineering
	Task Force (IETF). Note that other groups may also distribute		Task Force (IETF). Note that other groups may also distribute
	working documents as Internet-Drafts. The list of current Internet-		working documents as Internet-Drafts. The list of current Internet-
	Drafts is at https://datatracker.ietf.org/drafts/current/.		Drafts is at https://datatracker.ietf.org/drafts/current/.
	Internet-Drafts are draft documents valid for a maximum of six months		Internet-Drafts are draft documents valid for a maximum of six months
	and may be updated, replaced, or obsoleted by other documents at any		and may be updated, replaced, or obsoleted by other documents at any
	time. It is inappropriate to use Internet-Drafts as reference		time. It is inappropriate to use Internet-Drafts as reference
	material or to cite them other than as "work in progress."		material or to cite them other than as "work in progress."
	This Internet-Draft will expire on February 28, 2021.		This Internet-Draft will expire on March 21, 2021.
	Copyright Notice		Copyright Notice
	Copyright (c) 2020 IETF Trust and the persons identified as the		Copyright (c) 2020 IETF Trust and the persons identified as the
	document authors. All rights reserved.		document authors. All rights reserved.
	This document is subject to BCP 78 and the IETF Trust's Legal		This document is subject to BCP 78 and the IETF Trust's Legal
	Provisions Relating to IETF Documents (https://trustee.ietf.org/		Provisions Relating to IETF Documents (https://trustee.ietf.org/
	license-info) in effect on the date of publication of this document.		license-info) in effect on the date of publication of this document.
	Please review these documents carefully, as they describe your rights		Please review these documents carefully, as they describe your rights
	skipping to change at page 4, line 21 ¶		skipping to change at page 4, line 21 ¶
	C.3. Since draft-ietf-httpbis-cache-01 . . . . . . . . . . . . 39		C.3. Since draft-ietf-httpbis-cache-01 . . . . . . . . . . . . 39
	C.4. Since draft-ietf-httpbis-cache-02 . . . . . . . . . . . . 39		C.4. Since draft-ietf-httpbis-cache-02 . . . . . . . . . . . . 39
	C.5. Since draft-ietf-httpbis-cache-03 . . . . . . . . . . . . 39		C.5. Since draft-ietf-httpbis-cache-03 . . . . . . . . . . . . 39
	C.6. Since draft-ietf-httpbis-cache-04 . . . . . . . . . . . . 40		C.6. Since draft-ietf-httpbis-cache-04 . . . . . . . . . . . . 40
	C.7. Since draft-ietf-httpbis-cache-05 . . . . . . . . . . . . 40		C.7. Since draft-ietf-httpbis-cache-05 . . . . . . . . . . . . 40
	C.8. Since draft-ietf-httpbis-cache-06 . . . . . . . . . . . . 40		C.8. Since draft-ietf-httpbis-cache-06 . . . . . . . . . . . . 40
	C.9. Since draft-ietf-httpbis-cache-07 . . . . . . . . . . . . 41		C.9. Since draft-ietf-httpbis-cache-07 . . . . . . . . . . . . 41
	C.10. Since draft-ietf-httpbis-cache-08 . . . . . . . . . . . . 41		C.10. Since draft-ietf-httpbis-cache-08 . . . . . . . . . . . . 41
	C.11. Since draft-ietf-httpbis-cache-09 . . . . . . . . . . . . 41		C.11. Since draft-ietf-httpbis-cache-09 . . . . . . . . . . . . 41
	C.12. Since draft-ietf-httpbis-cache-10 . . . . . . . . . . . . 41		C.12. Since draft-ietf-httpbis-cache-10 . . . . . . . . . . . . 41
			C.13. Since draft-ietf-httpbis-cache-11 . . . . . . . . . . . . 42
	Acknowledgments . . . . . . . . . . . . . . . . . . . . . . . . . 42		Acknowledgments . . . . . . . . . . . . . . . . . . . . . . . . . 42
	Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . 42		Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . 42
	1. Introduction		1. Introduction
	The Hypertext Transfer Protocol (HTTP) is a stateless application-		The Hypertext Transfer Protocol (HTTP) is a stateless application-
	level request/response protocol that uses extensible semantics and		level request/response protocol that uses extensible semantics and
	self-descriptive messages for flexible interaction with network-based		self-descriptive messages for flexible interaction with network-based
	hypertext information systems. HTTP is defined by a series of		hypertext information systems. HTTP is defined by a series of
	documents that collectively form the HTTP/1.1 specification:		documents that collectively form the HTTP/1.1 specification:
	skipping to change at page 35, line 47 ¶		skipping to change at page 35, line 47 ¶
	Please add a note to the "Hypertext Transfer Protocol (HTTP) Warn		Please add a note to the "Hypertext Transfer Protocol (HTTP) Warn
	Codes" registry at <https://www.iana.org/assignments/http-warn-codes>		Codes" registry at <https://www.iana.org/assignments/http-warn-codes>
	to the effect that Warning is obsoleted.		to the effect that Warning is obsoleted.
	9. References		9. References
	9.1. Normative References		9.1. Normative References
	[Messaging]		[Messaging]
	Fielding, R., Ed., Nottingham, M., Ed., and J. F. Reschke,		Fielding, R., Ed., Nottingham, M., Ed., and J. Reschke,
	Ed., "HTTP/1.1 Messaging", Work in Progress, Internet-		Ed., "HTTP/1.1 Messaging", Work in Progress, Internet-
	Draft, draft-ietf-httpbis-messaging-11, August 27, 2020,		Draft, draft-ietf-httpbis-messaging-latest, September
	<https://tools.ietf.org/html/draft-ietf-httpbis-messaging-		2020, <https://tools.ietf.org/html/draft-ietf-httpbis-
	11>.		messaging-latest>.
	[RFC2119] Bradner, S., "Key words for use in RFCs to Indicate		[RFC2119] Bradner, S., "Key words for use in RFCs to Indicate
	Requirement Levels", BCP 14, RFC 2119,		Requirement Levels", BCP 14, RFC 2119,
	DOI 10.17487/RFC2119, March 1997,		DOI 10.17487/RFC2119, March 1997,
	<https://www.rfc-editor.org/info/rfc2119>.		<https://www.rfc-editor.org/info/rfc2119>.
	[RFC3986] Berners-Lee, T., Fielding, R., and L. Masinter, "Uniform		[RFC3986] Berners-Lee, T., Fielding, R., and L. Masinter, "Uniform
	Resource Identifier (URI): Generic Syntax", STD 66,		Resource Identifier (URI): Generic Syntax", STD 66,
	RFC 3986, DOI 10.17487/RFC3986, January 2005,		RFC 3986, DOI 10.17487/RFC3986, January 2005,
	<https://www.rfc-editor.org/info/rfc3986>.		<https://www.rfc-editor.org/info/rfc3986>.
	skipping to change at page 36, line 29 ¶		skipping to change at page 36, line 29 ¶
	[RFC7405] Kyzivat, P., "Case-Sensitive String Support in ABNF",		[RFC7405] Kyzivat, P., "Case-Sensitive String Support in ABNF",
	RFC 7405, DOI 10.17487/RFC7405, December 2014,		RFC 7405, DOI 10.17487/RFC7405, December 2014,
	<https://www.rfc-editor.org/info/rfc7405>.		<https://www.rfc-editor.org/info/rfc7405>.
	[RFC8174] Leiba, B., "Ambiguity of Uppercase vs Lowercase in RFC		[RFC8174] Leiba, B., "Ambiguity of Uppercase vs Lowercase in RFC
	2119 Key Words", BCP 14, RFC 8174, DOI 10.17487/RFC8174,		2119 Key Words", BCP 14, RFC 8174, DOI 10.17487/RFC8174,
	May 2017, <https://www.rfc-editor.org/info/rfc8174>.		May 2017, <https://www.rfc-editor.org/info/rfc8174>.
	[Semantics]		[Semantics]
	Fielding, R., Ed., Nottingham, M., Ed., and J. F. Reschke,		Fielding, R., Ed., Nottingham, M., Ed., and J. Reschke,
	Ed., "HTTP Semantics", Work in Progress, Internet-Draft,		Ed., "HTTP Semantics", Work in Progress, Internet-Draft,
	draft-ietf-httpbis-semantics-11, August 27, 2020,		draft-ietf-httpbis-semantics-latest, September 2020,
	<https://tools.ietf.org/html/draft-ietf-httpbis-semantics-		<https://tools.ietf.org/html/draft-ietf-httpbis-semantics-
	11>.		latest>.
	[USASCII] American National Standards Institute, "Coded Character		[USASCII] American National Standards Institute, "Coded Character
	Set -- 7-bit American Standard Code for Information		Set -- 7-bit American Standard Code for Information
	Interchange", ANSI X3.4, 1986.		Interchange", ANSI X3.4, 1986.
	9.2. Informative References		9.2. Informative References
	[RFC2616] Fielding, R., Gettys, J., Mogul, J., Frystyk, H.,		[RFC2616] Fielding, R., Gettys, J., Mogul, J., Frystyk, H.,
	Masinter, L., Leach, P., and T. Berners-Lee, "Hypertext		Masinter, L., Leach, P., and T. Berners-Lee, "Hypertext
	Transfer Protocol -- HTTP/1.1", RFC 2616,		Transfer Protocol -- HTTP/1.1", RFC 2616,
	skipping to change at page 42, line 5 ¶		skipping to change at page 42, line 5 ¶
	issues/193>)		issues/193>)
	o Switch to xml2rfc v3 mode for draft generation		o Switch to xml2rfc v3 mode for draft generation
	(<https://github.com/httpwg/http-core/issues/394>)		(<https://github.com/httpwg/http-core/issues/394>)
	C.12. Since draft-ietf-httpbis-cache-10		C.12. Since draft-ietf-httpbis-cache-10
	o In Section 5.2 (Cache-Control), adjust ABNF to allow empty lists		o In Section 5.2 (Cache-Control), adjust ABNF to allow empty lists
	(<https://github.com/httpwg/http-core/issues/210>)		(<https://github.com/httpwg/http-core/issues/210>)
			C.13. Since draft-ietf-httpbis-cache-11
			o None yet.
	Acknowledgments		Acknowledgments
	See Appendix "Acknowledgments" of [Semantics].		See Appendix "Acknowledgments" of [Semantics].
	Authors' Addresses		Authors' Addresses
	Roy T. Fielding (editor)		Roy T. Fielding (editor)
	Adobe		Adobe
	345 Park Ave		345 Park Ave
	San Jose, CA 95110		San Jose, CA 95110
	skipping to change at page 42, line 28 ¶		skipping to change at page 42, line 32 ¶
	URI: https://roy.gbiv.com/		URI: https://roy.gbiv.com/
	Mark Nottingham (editor)		Mark Nottingham (editor)
	Fastly		Fastly
	Prahran VIC		Prahran VIC
	Australia		Australia
	Email: mnot@mnot.net		Email: mnot@mnot.net
	URI: https://www.mnot.net/		URI: https://www.mnot.net/
	Julian F. Reschke (editor)		Julian Reschke (editor)
	greenbytes GmbH		greenbytes GmbH
	Hafenweg 16		Hafenweg 16
	48155 Münster		48155 Münster
	Germany		Germany
	Email: julian.reschke@greenbytes.de		Email: julian.reschke@greenbytes.de
	URI: https://greenbytes.de/tech/webdav/		URI: https://greenbytes.de/tech/webdav/
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