                                                                 Atom Link Relations

   Last Updated
           2009-02-20

   Reference
           [RFC4287]

   This registry is also available in XML and plain text formats.

                                                                                                                                                                          Registration
   Value      Description    Expected Display Characteristics             Security Considerations                                     Reference                             Date (if
                                                                                                                                                                          applicable)
alternate                                                                                                    [RFC4287]
             A URI that,
             when
             dereferenced,  Undefined; this relation can be     Automated agents should take care when this
             returns a feed used for background processing or   relation crosses administrative domains
current      document       to provide extended functionality   (e.g., the URI has a different authority     [RFC5005]                                                    2006-02-02
             containing the without displaying its value.       than the current document).
             most recent
             entries in the
             feed.
             The
             relationship A
             'describedby'
             B asserts that
             resource B                                         Descriptions of resources may be socially
             provides a                                         sensitive, may require processing to be
             description of                                     understood and may or may not not be
             resource A.                                        accurate. Consumers of descriptive resources
             There are no                                       should be aware of the source and chain of
describedby  constraints on None                                custody of the data. Security considerations [Phil_Archer][http://www.w3.org/TR/powder-dr/#assoc-linking] 2009-02-20
             the format or                                      for URIs (Section 7 of RFC 3986) and IRIs
             representation                                     (Section 8 of RFC 3987 ) apply to the extent
             of either A or                                     that describing resources may affect
             B, neither are                                     consumers' decisions about how or whether to
             there any                                          retrieve those resources.
             further
             constraints on
             either
             resource.
             An IRI of an
             editable
             Member Entry.
             When appearing
             within an
             atom:entry,    Undefined; this relation can be     Automated agents should take care when this
edit         the href IRI   used for background processing or   relation crosses administrative domains      [RFC5023]                                                    2007-07-27
             can be used to to provide extended functionality   (e.g., the URI has a different authority
             retrieve,      without displaying its value.       than the current document).
             update and
             delete the
             Resource
             represented by
             that Entry.
             An IRI of an
             editable Media
             Resource. When
             appearing
             within an
             atom:entry,    Undefined; this relation can be     Automated agents should take care when this
             the href IRI   used for background processing or   relation crosses administrative domains
edit-media   can be used to to provide extended functionality   (e.g., the URI has a different authority     [RFC5023]                                                    2007-07-27
             retrieve,      without displaying its value.       than the current document).
             update and
             delete the
             Media Resource
             associated
             with that
             Entry.
enclosure                                                                                                    [RFC4287]
             A URI that                                         Automated agents should take care when this
             refers to the  Undefined; this relation can be     relation crosses administrative domains
             furthest       used for background processing or   (e.g., the URI has a different authority
first        preceding      to provide extended functionality   than the current document). Such agents      [Mark Nottingham, December 2004]                             2006-02-02
             document in a  without displaying its value.       should also take care to detect circular
             series of                                          references.
             documents.
             A URI that                                         Automated agents should take care when this
             refers to the  Undefined; this relation can be     relation crosses administrative domains
             furthest       used for background processing or   (e.g., the URI has a different authority
last         following      to provide extended functionality   than the current document). Such agents      [Mark Nottingham, December 2004]                             2006-02-02
             document in a  without displaying its value.       should also take care to detect circular
             series of                                          references.
             documents.
license                                                                                                      [RFC4946]                                                    2007-05-14
             A URI that                                         Automated agents should take care when this
             refers to the  Undefined; this relation can be     relation crosses administrative domains
             immediately    used for background processing or   (e.g., the URI has a different authority
next         following      to provide extended functionality   than the current document). Such agents      [RFC5005]                                                    2006-02-02
             document in a  without displaying its value.       should also take care to detect circular
             series of                                          references.
             documents.
             A URI that
             refers to the
next-archive immediately                                        See                                          [RFC5005]                                                    2007-07-13
             following                                          [RFC-nottingham-atompub-feed-history-11.txt]
             archive
             document.
             rel="payment"
             indicates a
             URI where
             payment is
             accepted. It
             is meant as a
             general way to
             facilitate
             acts of
             payment, and
             thus this
             specification
             makes no
             assumptions on
             the type of
             payment or
             transaction
             protocol.
             Examples may
             include a WWW
             page where
             donations are
             accepted or
             where goods
             and services   End-user software could support
             are available  rel="payment" by displaying a       The link element is subject to tampering and
             for purchase.  "payment button" along with the     observation, as is the linked resource. For
             rel="payment"  content. Alternatively, content     that reason, implementations should clearly
             is not         aggregators may display a payment   signal the level trust and privacy a linked
             intended to    hyperlink containing the text       resource provides. If present, digital
             initiate an    specified in a corresponding title  signatures provide authentication, message
payment      automated      attribute within the <link>         integrity, and non-repudiation with proof of [Joshua_Kinberg][Robert_Sayre]                               2006-02-02
             transaction. A element, for example: <link         origin. Encryption provides data
             link element   rel="payment"                       confidentiality. Implementations should also
             with a         href="http://example.com/c.r.e.a.m" consider the level of confidentiality and
             rel="payment"  title="give me the loot"/> May      message integrity provided by the transport
             attribute may  display either a payment button or  used to reach the payment resource.
             exist at the   a hyperlink containing the text,
             feed/channel   "give me the loot."
             level and/or
             the entry/item
             level. For
             example, a
             rel="payment"
             link at the
             feed/channel
             level may
             point to a
             "tip jar" URI,
             whereas an
             entry/item
             containing a
             book review
             may include a
             rel="payment"
             link that
             points to the
             location where
             the book may
             be purchased
             through an
             online
             retailer.
             A URI that
             refers to the
prev-archive immediately                                        See                                          [RFC5005]                                                    2007-07-13
             preceding                                          [RFC-nottingham-atompub-feed-history-11.txt]
             archive
             document.
             A URI that                                         Automated agents should take care when this
             refers to the  Undefined; this relation can be     relation crosses administrative domains
             immediately    used for background processing or   (e.g., the URI has a different authority
previous     preceding      to provide extended functionality   than the current document). Such agents      [RFC5005]                                                    2006-02-02
             document in a  without displaying its value.       should also take care to detect circular
             series of                                          references.
             documents.
related                                                                                                      [RFC4287]
replies                                                                                                      [RFC4685]                                                    2006-06-28
self                                                                                                         [RFC4287]
             rel="service"  Support for rel="service" links     The link element is subject to tampering and
             indicates a    will vary across user agent         observation, as is the linked resource. For
             URI that can   implementations. The link relation  that reason, implementations should clearly
             be used to     is intended to provide user agents  signal the level trust and privacy a linked
             retrieve an    with a means of auto-discovering    resource provides. If present, digital
service      Atom           service endpoints so that basic     signatures provide authentication, message   [James_Snell]                                                2008-05-20
             Publishing     configuration actions can be        integrity, and non-repudiation with proof of
             Protocol       performed automatically with        origin. Encryption provides data
             Service        minimal user input. User agents may confidentiality. Implementations should also
             Document as    or may not present the link to end  consider the level of confidentiality and
             defined by RFC users.                              message integrity provided by the transport
             5023.                                              used to reach the payment resource.
             A URI that                                         Automated agents should take care when this
             refers to a    Undefined; this relation can be     relation crosses administrative domains
up           parent         used for background processing or   (e.g., the URI has a different authority     [Noah_Slater]                                                2009-01-28
             document in a  to provide extended functionality   than the current document). Such agents
             hierarchy of   without displaying its value.       should also take care to detect circular
             documents.                                         references.
via                                                                                                          [RFC4287]

                                                                        People

          ID             Name              Contact URI         Last Updated
   [James_Snell]    James Snell    mailto:jasnell&gmail.com    2008-05-20
   [Joshua_Kinberg] Joshua Kinberg mailto:jkinberg&gmail.com   2006-02
   [Noah_Slater]    Noah Slater    mailto:nslater&tumbolia.org 2009-01-30
   [Phil_Archer]    Phil Archer    mailto:phil&philarcher.org  2009-02-20
   [Robert_Sayre]   Robert Sayre   mailto:sayrer&gmail.com     2006-02
