HTTP Framework for Time-Based Access to Resource States -- Memento
RFC 7089
| Document | Type |
RFC - Informational
(December 2013; No errata)
Was draft-vandesompel-memento (individual)
|
|
|---|---|---|---|
| Last updated | 2013-12-20 | ||
| Stream | ISE | ||
| Formats | plain text pdf htmlized bibtex | ||
| IETF conflict review | conflict-review-vandesompel-memento | ||
| Stream | ISE state | Published RFC | |
| Consensus Boilerplate | Unknown | ||
| Document shepherd | No shepherd assigned | ||
| IESG | IESG state | RFC 7089 (Informational) | |
| Telechat date | |||
| Responsible AD | (None) | ||
| Send notices to | (None) | ||
| IANA | IANA review state | Version Changed - Review Needed | |
| IANA action state | RFC-Ed-Ack | ||
Independent Submission H. Van de Sompel
Request for Comments: 7089 Los Alamos National Laboratory
Category: Informational M. Nelson
ISSN: 2070-1721 Old Dominion University
R. Sanderson
Los Alamos National Laboratory
December 2013
HTTP Framework for Time-Based Access to Resource States -- Memento
Abstract
The HTTP-based Memento framework bridges the present and past Web.
It facilitates obtaining representations of prior states of a given
resource by introducing datetime negotiation and TimeMaps. Datetime
negotiation is a variation on content negotiation that leverages the
given resource's URI and a user agent's preferred datetime. TimeMaps
are lists that enumerate URIs of resources that encapsulate prior
states of the given resource. The framework also facilitates
recognizing a resource that encapsulates a frozen prior state of
another resource.
Status of This Memo
This document is not an Internet Standards Track specification; it is
published for informational purposes.
This is a contribution to the RFC Series, independently of any other
RFC stream. The RFC Editor has chosen to publish this document at
its discretion and makes no statement about its value for
implementation or deployment. Documents approved for publication by
the RFC Editor are not a candidate for any level of Internet
Standard; see Section 2 of RFC 5741.
Information about the current status of this document, any errata,
and how to provide feedback on it may be obtained at
http://www.rfc-editor.org/info/rfc7089.
Van de Sompel, et al. Informational [Page 1]
RFC 7089 HTTP Memento December 2013
Copyright Notice
Copyright (c) 2013 IETF Trust and the persons identified as the
document authors. All rights reserved.
This document is subject to BCP 78 and the IETF Trust's Legal
Provisions Relating to IETF Documents
(http://trustee.ietf.org/license-info) in effect on the date of
publication of this document. Please review these documents
carefully, as they describe your rights and restrictions with respect
to this document.
Table of Contents
1. Introduction ....................................................4
1.1. Terminology ................................................4
1.2. Notational Conventions .....................................4
1.3. Purpose ....................................................5
2. HTTP Headers, Link Relation Types ...............................7
2.1. HTTP Headers ...............................................7
2.1.1. Accept-Datetime and Memento-Datetime ................7
2.1.2. Vary ................................................8
2.1.3. Link ................................................8
2.2. Link Relation Types ........................................9
2.2.1. Link Relation Type "original" .......................9
2.2.2. Link Relation Type "timegate" .......................9
2.2.3. Link Relation Type "timemap" ........................9
2.2.4. Link Relation Type "memento" .......................10
3. Overview of the Memento Framework ..............................11
3.1. Datetime Negotiation ......................................11
3.2. TimeMaps ..................................................13
4. Datetime Negotiation: HTTP Interactions ........................14
4.1. Pattern 1 - The Original Resource Acts as Its Own
TimeGate ..................................................15
4.1.1. Pattern 1.1 - URI-R=URI-G; 302-Style
Negotiation; Distinct URI-M for Mementos ..........16
4.1.2. Pattern 1.2 - URI-R=URI-G; 200-Style
Negotiation; Distinct URI-M for Mementos ...........18
4.1.3. Pattern 1.3 - URI-R=URI-G; 200-Style
Negotiation; No Distinct URI-M for Mementos ........19
4.2. Pattern 2 - A Remote Resource Acts as a TimeGate
for the Original Resource .................................20
4.2.1. Pattern 2.1 - URI-R<>URI-G; 302-Style
Negotiation; Distinct URI-M for Mementos ...........22
4.2.2. Pattern 2.2 - URI-R<>URI-G; 200-Style
Negotiation; Distinct URI-M for Mementos ...........24
4.2.3. Pattern 2.3 - URI-R<>URI-G; 200-Style
Negotiation; No Distinct URI-M for Mementos ........25
Van de Sompel, et al. Informational [Page 2]
RFC 7089 HTTP Memento December 2013
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