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)
|
|
---|---|---|---|
Authors | Herbert Van de Sompel , Michael Nelson , Robert Sanderson | ||
Last updated | 2013-12-20 | ||
Stream | ISE | ||
Formats | plain text html 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 2013Show full document text