Web Linking
RFC 8288

Document Type RFC - Proposed Standard (October 2017; Errata)
Obsoletes RFC 5988
Was draft-nottingham-rfc5988bis (individual in art area)
Last updated 2017-10-25
Stream IETF
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Stream WG state (None)
Document shepherd Barry Leiba
Shepherd write-up Show (last changed 2017-05-02)
IESG IESG state RFC 8288 (Proposed Standard)
Consensus Boilerplate Yes
Telechat date
Responsible AD Alexey Melnikov
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IANA IANA review state Version Changed - Review Needed
IANA action state RFC-Ed-Ack
Internet Engineering Task Force (IETF)                     M. Nottingham
Request for Comments: 8288                                  October 2017
Obsoletes: 5988
Category: Standards Track
ISSN: 2070-1721

                              Web Linking

Abstract

   This specification defines a model for the relationships between
   resources on the Web ("links") and the type of those relationships
   ("link relation types").

   It also defines the serialisation of such links in HTTP headers with
   the Link header field.

Status of This Memo

   This is an Internet Standards Track document.

   This document is a product of the Internet Engineering Task Force
   (IETF).  It represents the consensus of the IETF community.  It has
   received public review and has been approved for publication by the
   Internet Engineering Steering Group (IESG).  Further information on
   Internet Standards is available in Section 2 of RFC 7841.

   Information about the current status of this document, any errata,
   and how to provide feedback on it may be obtained at
   https://www.rfc-editor.org/info/rfc8288.

Nottingham                   Standards Track                    [Page 1]
RFC 8288                       Web Linking                  October 2017

Copyright Notice

   Copyright (c) 2017 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
   (https://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.  Code Components extracted from this document must
   include Simplified BSD License text as described in Section 4.e of
   the Trust Legal Provisions and are provided without warranty as
   described in the Simplified BSD License.

   This document may contain material from IETF Documents or IETF
   Contributions published or made publicly available before November
   10, 2008.  The person(s) controlling the copyright in some of this
   material may not have granted the IETF Trust the right to allow
   modifications of such material outside the IETF Standards Process.
   Without obtaining an adequate license from the person(s) controlling
   the copyright in such materials, this document may not be modified
   outside the IETF Standards Process, and derivative works of it may
   not be created outside the IETF Standards Process, except to format
   it for publication as an RFC or to translate it into languages other
   than English.

Nottingham                   Standards Track                    [Page 2]
RFC 8288                       Web Linking                  October 2017

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   4
     1.1.  Notational Conventions  . . . . . . . . . . . . . . . . .   4
     1.2.  Conformance and Error Handling  . . . . . . . . . . . . .   4
   2.  Links . . . . . . . . . . . . . . . . . . . . . . . . . . . .   6
     2.1.  Link Relation Types . . . . . . . . . . . . . . . . . . .   6
       2.1.1.  Registered Relation Types . . . . . . . . . . . . . .   6
       2.1.2.  Extension Relation Types  . . . . . . . . . . . . . .   8
     2.2.  Target Attributes . . . . . . . . . . . . . . . . . . . .   9
   3.  Link Serialisation in HTTP Headers  . . . . . . . . . . . . .   9
     3.1.  Link Target . . . . . . . . . . . . . . . . . . . . . . .  10
     3.2.  Link Context  . . . . . . . . . . . . . . . . . . . . . .  10
     3.3.  Relation Type . . . . . . . . . . . . . . . . . . . . . .  11
     3.4.  Target Attributes . . . . . . . . . . . . . . . . . . . .  11
       3.4.1.  Serialisation-Defined Attributes  . . . . . . . . . .  11
       3.4.2.  Extension Attributes  . . . . . . . . . . . . . . . .  13
     3.5.  Link Header Field Examples  . . . . . . . . . . . . . . .  13
   4.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .  14
     4.1.  Link HTTP Header Field Registration . . . . . . . . . . .  14
     4.2.  Link Relation Type Registry . . . . . . . . . . . . . . .  14
     4.3.  Link Relation Application Data Registry . . . . . . . . .  15
   5.  Security Considerations . . . . . . . . . . . . . . . . . . .  15
   6.  Internationalisation Considerations . . . . . . . . . . . . .  16
   7.  References  . . . . . . . . . . . . . . . . . . . . . . . . .  16
     7.1.  Normative References  . . . . . . . . . . . . . . . . . .  16
     7.2.  Informative References  . . . . . . . . . . . . . . . . .  17
   Appendix A.  Notes on Other Link Serialisations . . . . . . . . .  19
     A.1.  Link Serialisation in HTML  . . . . . . . . . . . . . . .  19
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