Additional Link Relation Types
draft-snell-additional-link-relations-06

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Last updated 2012-10-18
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Network Working Group                                           J. Snell
Internet-Draft                                          October 18, 2012
Intended status: Informational
Expires: April 21, 2013

                     Additional Link Relation Types
                draft-snell-additional-link-relations-06

Abstract

   This specification defines a number of additional Link Relation Types
   that can used for a variety of purposes..

Status of this Memo

   This Internet-Draft is submitted to IETF in full conformance with the
   provisions of BCP 78 and BCP 79.

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   This Internet-Draft will expire on April 21, 2013.

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   Copyright (c) 2012 IETF Trust and the persons identified as the
   document authors.  All rights reserved.

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Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . . . 3
   2.  "about" . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
   3.  "preview" . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
   4.  "privacy-policy"  . . . . . . . . . . . . . . . . . . . . . . . 3
   5.  "terms-of-service"  . . . . . . . . . . . . . . . . . . . . . . 4
   6.  "type"  . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
   7.  IANA Considerations . . . . . . . . . . . . . . . . . . . . . . 5
   8.  Security Considerations . . . . . . . . . . . . . . . . . . . . 6
   9.  Informative References  . . . . . . . . . . . . . . . . . . . . 6
   Author's Address  . . . . . . . . . . . . . . . . . . . . . . . . . 6

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1.  Introduction

   The fundamental model for Web Links and the Registry of Link
   Relations are established by [RFC5988].  This specification defines
   and adds the following additional types of link relations to the
   registry: about, preview, privacy-policy, terms-of-service, and type.

2.  "about"

   The "about" Link relation can be used to refer to a resource that is
   the subject or topic of the link's context.  Multiple subjects can be
   indicated through the use of multiple "about" link relations.

   For example, if the context resource is a review about a particular
   product, the "about" link can be used to reference the URL of the
   product:

     HTTP/1.1 200 OK
     Content-Type: application/json
     Link: <http://store.example.org/product/abc>; rel="about"

     {...}

3.  "preview"

   The "preview" Link relation can be used to refer to a resource that
   serves as a preview of the link's context, likely with reduced
   quality or limited content.  For instance, the preview link might
   reference a screen capture of a video, a brief snippet of audio from
   a song or a thumbnail representation of an image.

   For example, issuing a HTTP HEAD request to a URI representing a
   large video or image file might return a link to a short or lower
   quality preview of the original:

     HTTP/1.1 200 OK
     Content-Text: video/mpeg
     Link: <http://example.org/preview/10-second-preview.mpg>;
       rel="preview"; type="video/mpeg"

4.  "privacy-policy"

   The "privacy-policy" Link relation can be used to refer to a resource
   describing the privacy policy associated with the link's context.
   The privacy policy can be any resource that discloses what personal

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   information about the user is collected, and how that personal
   information is stored, used, managed and disclosed to other parties.

   For example, an HTTP server that collects personal information about
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