link-relations.xml

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<?oxygen RNGSchema="link-relations.rng" type="xml"?>
<registry xmlns="http://www.iana.org/assignments" id="link-relations">
  <title>Link Relations</title>
  <created>2005-08-26</created>
  <updated>2017-10-26</updated>

<registry id="link-relations-1">
  <title>Link Relation Types</title>
  <xref type="rfc" data="rfc8288"/>
  <registration_rule>Specification Required</registration_rule>
  <expert>Mark Nottingham, Julian Reschke, Jan Algermissen</expert>
  <note>New link relations, along with changes to existing relations, can be requested 
using the <xref type="uri" data="https://github.com/link-relations/registry">registry interface</xref> or the mailing list defined in <xref type="rfc" data="rfc8288"/>.
  </note>  
  
  <record>
    <value>about</value>
    <description>Refers to a resource that is the subject of the link's context.</description>
    <spec><xref type="rfc" data="rfc6903"/>, section 2</spec>
  </record>
  
  <record>
    <value>alternate</value>
    <description>Refers to a substitute for this context</description>
    <spec><xref type="uri" data="http://www.w3.org/TR/html5/links.html#link-type-alternate"/></spec>
  </record>
  
  <record>
    <value>appendix</value>
    <description>Refers to an appendix.</description>
    <spec><xref type="uri" data="http://www.w3.org/TR/1999/REC-html401-19991224"/></spec>
  </record>
  
  <record date="2010-11-09">
    <value>archives</value>
    <description>Refers to a collection of records, documents, or other
      materials of historical interest.</description>
    <spec><xref type="uri" data="http://www.w3.org/TR/2011/WD-html5-20110113/links.html#rel-archives"/></spec>
  </record>
  
  <record date="2010-11-09">
    <value>author</value>
    <description>Refers to the context's author.</description>
    <spec><xref type="uri" data="http://www.w3.org/TR/html5/links.html#link-type-author"/></spec>
  </record>
  
  <record date="2015-12-21">
    <value>blocked-by</value>
    <description>Identifies the entity that blocks access to a resource
      following receipt of a legal demand.</description>
    <spec><xref type="rfc" data="rfc7725"/></spec>
  </record>
  
  <record>
    <value>bookmark</value>
    <description>Gives a permanent link to use for bookmarking purposes.</description>
    <spec><xref type="uri" data="http://www.w3.org/TR/html5/links.html#link-type-bookmark"/></spec>
  </record>
  
  <record>
    <value>canonical</value>
    <description>Designates the preferred version of a resource (the IRI and its contents).</description>
    <spec><xref type="rfc" data="rfc6596"/></spec>
  </record>
  
  <record>
    <value>chapter</value>
    <description>Refers to a chapter in a collection of resources.</description>
    <spec><xref type="uri" data="http://www.w3.org/TR/1999/REC-html401-19991224"/></spec>
  </record>
  
  <record date="2017-10-26">
    <value>cite-as</value>		
    <description>Indicates that the link target is preferred over the link context for the purpose of referencing.</description>		
    <spec><xref type="draft" data="draft-vandesompel-citeas"/></spec>		
  </record>
  
  <record>
    <value>collection</value>
    <description>The target IRI points to a resource which represents the collection resource for the context IRI.</description>
    <spec><xref type="rfc" data="rfc6573"/></spec>
  </record>
  
  <record>
    <value>contents</value>
    <description>Refers to a table of contents.</description>
    <spec><xref type="uri" data="http://www.w3.org/TR/1999/REC-html401-19991224"/></spec>
  </record>
  
  <record date="2016-08-12">
    <value>convertedFrom</value>
    <description>The document linked to was later converted to the
      document that contains this link relation.  For example, an RFC can
      have a link to the Internet-Draft that became the RFC; in that case,
      the link relation would be "convertedFrom".</description>
    <spec><xref type="rfc" data="rfc7991"/></spec>
    <note>This relation is different than "predecessor-version" in that
      "predecessor-version" is for items in a version control system.  It
      is also different than "previous" in that this relation is used for
      converted resources, not those that are part of a sequence of
      resources.</note>
  </record>
  
  <record>
    <value>copyright</value>
    <description>Refers to a copyright statement that applies to the
    link's context.</description>
    <spec><xref type="uri" data="http://www.w3.org/TR/1999/REC-html401-19991224"/></spec>
  </record>

  <record>
    <value>create-form</value>
    <description>The target IRI points to a resource where a submission form can be obtained.</description>
    <spec><xref type="rfc" data="rfc6861"/></spec>
  </record>

  <record>
    <value>credits</value>
    <description>Denotes a resource that lists the names of the people who contributed to some part or other of a resource or collection of resources, such as a website or Web application. An explicit credits link supplements any ad-hoc credits in the main body of the referring resource, affording a space for those who would not ordinarily be credited in the main body.</description>
    <spec><xref type="uri" data="https://creditstxt.com/"/></spec>
    <note>Examples: authors of open-source frameworks and components, website themes and stylesheets, visual design, typography, etc.</note>
  </record>
  
  <record>
    <value>current</value>
    <description>Refers to a resource containing the most recent
      item(s) in a collection of resources.</description>
    <spec><xref type="rfc" data="rfc5005"/></spec>
  </record>
  
  <record>
    <value>describedby</value>
    <description>Refers to a resource providing information about the
      link's context.</description>
    <spec><xref type="uri" data="http://www.w3.org/TR/powder-dr/#assoc-linking"/></spec>
  </record>
  
  <record>
    <value>describes</value>
    <description>The relationship A 'describes' B asserts that
      resource A provides a description of resource B. There are no
      constraints on the format or representation of either A or B,
      neither are there any further constraints on either resource.</description>
    <spec><xref type="rfc" data="rfc6892"/></spec>
      <note>This link relation type is the inverse of the 'describedby'
        relation type.  While 'describedby' establishes a relation from
        the described resource back to the resource that describes it,
        'describes' established a relation from the describing resource to
        the resource it describes.  If B is 'describedby' A, then A
        'describes' B.</note>
  </record>
  
  <record>
    <value>disclosure</value>
    <description>Refers to a list of patent disclosures made with respect to 
      material for which 'disclosure' relation is specified.</description>
    <spec><xref type="rfc" data="rfc6579"/></spec>
  </record>
  
  <record date="2016-02-29">
    <value>dns-prefetch</value>
    <description>Used to indicate an origin that will be used to fetch required 
      resources for the link context, and that the user agent ought to resolve 
      as early as possible.</description>
    <spec><xref type="uri" data="https://www.w3.org/TR/resource-hints/"/></spec>
  </record>
  
  <record>
    <value>duplicate</value>
    <description>Refers to a resource whose available representations
      are byte-for-byte identical with the corresponding representations of
      the context IRI.</description>
    <spec><xref type="rfc" data="rfc6249"/></spec>
    <note>This relation is for static resources.  That is, an HTTP GET
      request on any duplicate will return the same representation.  It
      does not make sense for dynamic or POSTable resources and should not
      be used for them.
    </note>
  </record>
  
  <record>
    <value>edit</value>
    <description>Refers to a resource that can be used to edit the
      link's context.</description>
    <spec><xref type="rfc" data="rfc5023"/></spec>
  </record>
  
  <record>
    <value>edit-form</value>
    <description>The target IRI points to a resource where a submission form for
      editing associated resource can be obtained.</description>
    <spec><xref type="rfc" data="rfc6861"/></spec>
  </record>
  
  <record>
    <value>edit-media</value>
    <description>Refers to a resource that can be used to edit media
      associated with the link's context.</description>
    <spec><xref type="rfc" data="rfc5023"/></spec>
  </record>
  
  <record>
    <value>enclosure</value>
    <description>Identifies a related resource that is potentially
      large and might require special handling.</description>
    <spec><xref type="rfc" data="rfc4287"/></spec>
  </record>
  
  <record>
    <value>first</value>
    <description>An IRI that refers to the furthest preceding resource
    in a series of resources.</description>
    <spec><xref type="rfc" data="rfc8288"/></spec>
    <note>This relation type registration did not indicate a
      reference.  Originally requested by Mark Nottingham in December
      2004.
    </note>
  </record>
  
  <record>
    <value>glossary</value>
    <description>Refers to a glossary of terms.</description>
    <spec><xref type="uri" data="http://www.w3.org/TR/1999/REC-html401-19991224"/></spec>
  </record>
  
  <record>
    <value>help</value>
    <description>Refers to context-sensitive help.</description>
    <spec><xref type="uri" data="http://www.w3.org/TR/html5/links.html#link-type-help"/></spec>
  </record>
  
  <record>
    <value>hosts</value>
    <description>Refers to a resource hosted by the server indicated by
      the link context.</description>
    <spec><xref type="rfc" data="rfc6690"/></spec>
    <note>This relation is used in CoRE where links are retrieved as a
      "/.well-known/core" resource representation, and is the default
      relation type in the CoRE Link Format.</note>
  </record>
  
  <record>
    <value>hub</value>
    <description>Refers to a hub that enables registration for
    notification of updates to the context.</description>    
    <spec><xref type="uri" data="http://pubsubhubbub.googlecode.com"/></spec>
    <note>This relation type was requested by Brett Slatkin.</note>
  </record>
  
  <record date="2010-11-09">
    <value>icon</value>
    <description>Refers to an icon representing the link's context.</description>    
    <spec><xref type="uri" data="http://www.w3.org/TR/html5/links.html#link-type-icon"/></spec>
  </record>
  
  <record>
    <value>index</value>
    <description>Refers to an index.</description>
    <spec><xref type="uri" data="http://www.w3.org/TR/1999/REC-html401-19991224"/></spec>
  </record>
  
  <record>
    <value>intervalAfter</value>
    <description>refers to a resource associated with a time interval that ends before the beginning of the time interval associated with the context resource</description>
    <spec><xref type="uri" data="https://www.w3.org/TR/owl-time/#time:intervalAfter"/> section 4.2.21</spec>
  </record>
 
  <record>
    <value>intervalBefore</value>
    <description>refers to a resource associated with a time interval that begins after the end of the time interval associated with the context resource</description>
    <spec><xref type="uri" data="https://www.w3.org/TR/owl-time/#time:intervalBefore"/> section 4.2.22</spec>
  </record>
  
  <record>
    <value>intervalContains</value>
    <description>refers to a resource associated with a time interval that begins after the beginning of the time interval associated with the context resource, and ends before the end of the time interval associated with the context resource</description>
    <spec><xref type="uri" data="https://www.w3.org/TR/owl-time/#time:intervalContains"/> section 4.2.23</spec>
  </record>
  
  <record>
    <value>intervalDisjoint</value>
    <description>refers to a resource associated with a time interval that begins after the end of the time interval associated with the context resource, or ends before the beginning of the time interval associated with the context resource</description>
    <spec><xref type="uri" data="https://www.w3.org/TR/owl-time/#time:intervalDisjoint"/> section 4.2.24</spec>
  </record>
  
  <record>
    <value>intervalDuring</value>
    <description>refers to a resource associated with a time interval that begins before the beginning of the time interval associated with the context resource, and ends after the end of the time interval associated with the context resource</description>
    <spec><xref type="uri" data="https://www.w3.org/TR/owl-time/#time:intervalDuring"/> section 4.2.25</spec>
  </record>
  
  <record>
    <value>intervalEquals</value>
    <description>refers to a resource associated with a time interval whose beginning coincides with the beginning of the time interval associated with the context resource, and whose end coincides with the end of the time interval associated with the context resource</description>
    <spec><xref type="uri" data="https://www.w3.org/TR/owl-time/#time:intervalEquals"/> section 4.2.26</spec>
  </record>
  
  <record>
    <value>intervalFinishedBy</value>
    <description>refers to a resource associated with a time interval that begins after the beginning of the time interval associated with the context resource, and whose end coincides with the end of the time interval associated with the context resource</description>
    <spec><xref type="uri" data="https://www.w3.org/TR/owl-time/#time:intervalFinishedBy"/> section 4.2.27</spec>
  </record>
  
  <record>
    <value>intervalFinishes</value>
    <description>refers to a resource associated with a time interval that begins before the beginning of the time interval associated with the context resource, and whose end coincides with the end of the time interval associated with the context resource</description>
    <spec><xref type="uri" data="https://www.w3.org/TR/owl-time/#time:intervalFinishes"/> section 4.2.28</spec>
  </record>
  
  <record>
    <value>intervalIn</value>
    <description>refers to a resource associated with a time interval that begins before or is coincident with the beginning of the time interval associated with the context resource, and ends after or is coincident with the end of the time interval associated with the context resource</description>
    <spec><xref type="uri" data="https://www.w3.org/TR/owl-time/#time:intervalIn"/> section 4.2.29</spec>
  </record>
  
  <record>
    <value>intervalMeets</value>
    <description>refers to a resource associated with a time interval whose beginning coincides with the end of the time interval associated with the context resource</description>
    <spec><xref type="uri" data="https://www.w3.org/TR/owl-time/#time:intervalMeets"/> section 4.2.30</spec>
  </record>
  
  <record>
    <value>intervalMetBy</value>
    <description>refers to a resource associated with a time interval whose beginning coincides with the end of the time interval associated with the context resource</description>
    <spec><xref type="uri" data="https://www.w3.org/TR/owl-time/#time:intervalMetBy"/> section 4.2.31</spec>
  </record>
  
  <record>
    <value>intervalOverlappedBy</value>
    <description>refers to a resource associated with a time interval that begins before the beginning of the time interval associated with the context resource, and ends after the beginning of the time interval associated with the context resource</description>
    <spec><xref type="uri" data="https://www.w3.org/TR/owl-time/#time:intervalOverlappedBy"/> section 4.2.32</spec>
  </record>
  
  <record>
    <value>intervalOverlaps</value>
    <description>refers to a resource associated with a time interval that begins before the end of the time interval associated with the context resource, and ends after the end of the time interval associated with the context resource</description>
    <spec><xref type="uri" data="https://www.w3.org/TR/owl-time/#time:intervalOverlaps"/> section 4.2.33</spec>
  </record>
  
  <record>
    <value>intervalStartedBy</value>
    <description>refers to a resource associated with a time interval whose beginning coincides with the beginning of the time interval associated with the context resource, and ends before the end of the time interval associated with the context resource</description>
    <spec><xref type="uri" data="https://www.w3.org/TR/owl-time/#time:intervalStartedBy"/> section 4.2.34</spec>
  </record>
  
  <record>
    <value>intervalStarts</value>
    <description>refers to a resource associated with a time interval whose beginning coincides with the beginning of the time interval associated with the context resource, and ends after the end of the time interval associated with the context resource</description>
    <spec><xref type="uri" data="https://www.w3.org/TR/owl-time/#time:intervalStarts"/> section 4.2.35</spec>
  </record>
  
  <record>
    <value>item</value>
    <description>The target IRI points to a resource that is a member of the collection represented by the context IRI.</description>
    <spec><xref type="rfc" data="rfc6573"/></spec>
  </record>
  
  <record>
    <value>last</value>
    <description>An IRI that refers to the furthest following resource
      in a series of resources.</description>
    <spec><xref type="rfc" data="rfc8288"/></spec>
    <note>This relation type registration did not indicate a
      reference. Originally requested by Mark Nottingham in December
      2004.
    </note>
  </record>
  
  <record>
    <value>latest-version</value>
    <description>Points to a resource containing the latest (e.g.,
      current) version of the context.</description>
    <spec><xref type="rfc" data="rfc5829"/></spec>
  </record>
  
  <record>
    <value>license</value>
    <description>Refers to a license associated with this context.</description>
    <spec><xref type="rfc" data="rfc4946"/></spec>
    <note>For implications of use in HTML, see: 
      http://www.w3.org/TR/html5/links.html#link-type-license</note>
  </record>
  
  <record>
    <value>lrdd</value>
    <description>Refers to further information about the link's context,
      expressed as a LRDD ("Link-based Resource Descriptor Document")
      resource.  See <xref type="rfc" data="rfc6415"/> for information about
      processing this relation type in host-meta documents. When used
      elsewhere, it refers to additional links and other metadata.
      Multiple instances indicate additional LRDD resources. LRDD
      resources MUST have an "application/xrd+xml" representation, and
      MAY have others.</description>
    <spec><xref type="rfc" data="rfc6415"/></spec>
  </record>

  <record date="2013-11-01">
    <value>memento</value>
    <description>The Target IRI points to a Memento, a fixed resource that will not change state anymore.</description>
    <spec><xref type="rfc" data="rfc7089"/></spec>
    <note>A Memento for an Original Resource is a resource that
      encapsulates a prior state of the Original Resource.</note>
  </record>

  <record>
    <value>monitor</value>
    <description>Refers to a resource that can be used to monitor changes in an HTTP resource.
    </description>
    <spec><xref type="rfc" data="rfc5989"/></spec>
  </record>
  
  <record>
    <value>monitor-group</value>
    <description>Refers to a resource that can be used to monitor changes in a specified group of HTTP resources.
    </description>
    <spec><xref type="rfc" data="rfc5989"/></spec>
  </record>
  
  <record date="2006-02-02">
    <value>next</value>
    <description>Indicates that the link's context is a part of a series, and
      that the next in the series is the link target.
    </description>
    <spec><xref type="uri" data="http://www.w3.org/TR/html5/links.html#link-type-next"/></spec>
  </record> 
  
  <record>
    <value>next-archive</value>
    <description>Refers to the immediately following archive resource.</description>
    <spec><xref type="rfc" data="rfc5005"/></spec>
  </record>
  
  <record date="2010-11-09">
    <value>nofollow</value>
    <description>Indicates that the context’s original author or publisher does not endorse the link target.</description>    
    <spec><xref type="uri" data="http://www.w3.org/TR/html5/links.html#link-type-nofollow"/></spec>
  </record>
  
  <record date="2010-11-09">
    <value>noreferrer</value>
    <description>Indicates that no referrer information is to be leaked when following the link.</description>    
    <spec><xref type="uri" data="http://www.w3.org/TR/html5/links.html#link-type-noreferrer"/></spec>
  </record>
  
  <record date="2013-11-01">
    <value>original</value>
    <description>The Target IRI points to an Original Resource.</description>
    <spec><xref type="rfc" data="rfc7089"/></spec>
    <note>An Original Resource is a resource that exists or used to
      exist, and for which access to one of its prior states may be
      required.
    </note>
  </record>
  
  <record>
    <value>payment</value>
    <description>Indicates a resource where payment is accepted.</description>
    <spec><xref type="rfc" data="rfc8288"/></spec>
    <note>This relation type registration did not indicate a
      reference.  Requested by Joshua Kinberg and Robert Sayre.  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 web page where
      donations are accepted or where goods and services are available
      for purchase. rel="payment" is not intended to initiate an
      automated transaction.  In Atom documents, a link element with a
      rel="payment" attribute may exist at the feed/channel 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.
    </note>
  </record>
  
  <record date="2016-02-04">
    <value>pingback</value>
    <description>Gives the address of the pingback resource for the link context.</description>    
    <spec><xref type="uri" data="http://www.hixie.ch/specs/pingback/pingback"/></spec>
  </record>
  
  <record date="2016-02-29">
    <value>preconnect</value>
    <description>Used to indicate an origin that will be used to fetch required 
      resources for the link context. Initiating an early connection, which 
      includes the DNS lookup, TCP handshake, and optional TLS negotiation, 
      allows the user agent to mask the high latency costs of establishing a 
      connection.</description>
    <spec><xref type="uri" data="https://www.w3.org/TR/resource-hints/"/></spec>
  </record>

  <record>
    <value>predecessor-version</value>
    <description>Points to a resource containing the predecessor
      version in the version history.
    </description>
    <spec><xref type="rfc" data="rfc5829"/></spec>
  </record>

  <record date="2010-11-09" updated="2016-03-03">
    <value>prefetch</value>
    <description>The prefetch link relation type is used to identify a resource 
      that might be required by the next navigation from the link context, and 
      that the user agent ought to fetch, such that the user agent can deliver a 
      faster response once the resource is requested in the future.</description>    
    <spec><xref type="uri" data="http://www.w3.org/TR/resource-hints/"/></spec>
  </record>
  
  <record date="2016-01-22">
    <value>preload</value>
    <description>Refers to a resource that should be loaded early in the 
      processing of the link's context, without blocking rendering.</description>    
    <spec><xref type="uri" data="http://www.w3.org/TR/preload/"/></spec>
    <note>Additional target attributes establish the detailed fetch properties of the link.</note>
  </record>
  
  <record date="2016-02-29">
    <value>prerender</value>
    <description>Used to identify a resource that might be required by the next 
      navigation from the link context, and that the user agent ought to fetch 
      and execute, such that the user agent can deliver a faster response once 
      the resource is requested in the future.</description>
    <spec><xref type="uri" data="https://www.w3.org/TR/resource-hints/"/></spec>
  </record>

  <record>
    <value>prev</value>
    <description>Indicates that the link's context is a part of a series, and
      that the previous in the series is the link target.
    </description>
    <spec><xref type="uri" data="http://www.w3.org/TR/html5/links.html#link-type-prev"/></spec>
  </record>  
  
  <record>
    <value>preview</value>
    <description>Refers to a resource that provides a preview of the link's context.</description>
    <spec><xref type="rfc" data="rfc6903"/>, section 3</spec>
  </record>

  <record>
    <value>previous</value>
    <description>Refers to the previous resource in an ordered series
      of resources.  Synonym for "prev".</description>
    <spec><xref type="uri" data="http://www.w3.org/TR/1999/REC-html401-19991224"/></spec>
  </record>

  <record>
    <value>prev-archive</value>
    <description>Refers to the immediately preceding archive resource.</description>
    <spec><xref type="rfc" data="rfc5005"/></spec>
  </record>  
  
  <record>
    <value>privacy-policy</value>
    <description>Refers to a privacy policy associated with the link's context.</description>
    <spec><xref type="rfc" data="rfc6903"/>, section 4</spec>
  </record>  
  
  <record>
    <value>profile</value>
    <description>Identifying that a resource representation conforms
to a certain profile, without affecting the non-profile semantics
of the resource representation.</description>    
    <spec><xref type="rfc" data="rfc6906"/></spec>
    <note>Profile URIs are primarily intended to be used as
identifiers, and thus clients SHOULD NOT indiscriminately access
profile URIs.</note>
  </record>
  
  <record>
    <value>related</value>
    <description>Identifies a related resource.</description>
    <spec><xref type="rfc" data="rfc4287"/></spec>
  </record>
  
  <record>
    <value>restconf</value>
    <description>Identifies the root of RESTCONF API as configured on this HTTP server.
      The "restconf" relation defines the root of the API defined in RFC8040.
      Subsequent revisions of RESTCONF will use alternate relation values to support 
      protocol versioning.</description>
    <spec><xref type="rfc" data="rfc8040"/></spec>
  </record>
  
  <record>
    <value>replies</value>
    <description>Identifies a resource that is a reply to the context
      of the link.
    </description>
    <spec><xref type="rfc" data="rfc4685"/></spec>
  </record>

  <record date="2010-11-09">
    <value>search</value>
    <description>Refers to a resource that can be used to search through
      the link's context and related resources.</description>
    <spec><xref type="uri" data="http://www.opensearch.org/Specifications/OpenSearch/1.1"/></spec>
  </record>

  <record>
    <value>section</value>
    <description>Refers to a section in a collection of resources.</description>
    <spec><xref type="uri" data="http://www.w3.org/TR/1999/REC-html401-19991224"/></spec>
  </record>
  
  <record>
    <value>self</value>
    <description>Conveys an identifier for the link's context.
    </description>
    <spec><xref type="rfc" data="rfc4287"/></spec>
  </record>
  
  <record>
    <value>service</value>
    <description>Indicates a URI that can be used to retrieve a
      service document.</description>
    <spec><xref type="rfc" data="rfc5023"/></spec>
    <note>When used in an Atom document, this relation type specifies
      Atom Publishing Protocol service documents by default.  Requested
      by James Snell.
    </note>
  </record>
  
  <record>
    <value>start</value>
    <description>Refers to the first resource in a collection of
      resources.</description>
    <spec><xref type="uri" data="http://www.w3.org/TR/1999/REC-html401-19991224"/></spec>
  </record>
  
  <record>
    <value>stylesheet</value>
    <description>Refers to a stylesheet.</description>
    <spec><xref type="uri" data="http://www.w3.org/TR/html5/links.html#link-type-stylesheet"/></spec>
  </record>
  
  <record>
    <value>subsection</value>
    <description>Refers to a resource serving as a subsection in a
      collection of resources.</description>
    <spec><xref type="uri" data="http://www.w3.org/TR/1999/REC-html401-19991224"/></spec>
  </record>
  
  <record>
    <value>successor-version</value>
    <description>Points to a resource containing the successor version
      in the version history.
    </description>
    <spec><xref type="rfc" data="rfc5829"/></spec>
  </record>
  
  <record>
    <value>tag</value>
    <description>Gives a tag (identified by the given address) that applies to
      the current document.
    </description>
    <spec><xref type="uri" data="http://www.w3.org/TR/html5/links.html#link-type-tag"/></spec>
  </record>  
  
  <record>
    <value>terms-of-service</value>
    <description>Refers to the terms of service associated with the link's context.</description>
    <spec><xref type="rfc" data="rfc6903"/>, section 5</spec>
  </record>  

  <record date="2013-11-01">
    <value>timegate</value>
    <description>The Target IRI points to a TimeGate for an Original Resource.</description>
    <spec><xref type="rfc" data="rfc7089"/></spec>
    <note>A TimeGate for an Original Resource is a resource that is
      capable of datetime negotiation to support access to prior states
      of the Original Resource.
    </note>
  </record>

  <record date="2013-11-01">
    <value>timemap</value>
    <description>The Target IRI points to a TimeMap for an Original Resource.</description>
    <spec><xref type="rfc" data="rfc7089"/></spec>
    <note>A TimeMap for an Original Resource is a resource from which
      a list of URIs of Mementos of the Original Resource is available.
    </note>
  </record>

  <record>
    <value>type</value>
    <description>Refers to a resource identifying the abstract semantic type of which the link's context is considered to be an instance.</description>
    <spec><xref type="rfc" data="rfc6903"/>, section 6</spec>
  </record>
  
  <record>
    <value>up</value>
    <description>Refers to a parent document in a hierarchy of
      documents.
    </description>
    <spec><xref type="rfc" data="rfc8288"/></spec>
    <note>This relation type registration did not indicate a
      reference.  Requested by Noah Slater.</note>
  </record>
  
  <record>
    <value>version-history</value>
    <description>Points to a resource containing the version history
      for the context.
    </description>
    <spec><xref type="rfc" data="rfc5829"/></spec>
  </record>
  
  <record>
    <value>via</value>
    <description>Identifies a resource that is the source of the
      information in the link's context.
    </description>
    <spec><xref type="rfc" data="rfc4287"/></spec>
  </record>
  
  <record date="2016-04-19">
    <value>webmention</value>
    <description>Identifies a target URI that supports the Webmention protcol.
    This allows clients that mention a resource in some form of publishing process
    to contact that endpoint and inform it that this resource has been mentioned.</description>    
    <spec><xref type="uri" data="http://www.w3.org/TR/webmention/"/></spec>
    <note>This is a similar "Linkback" mechanism to the ones of Refback, Trackback, and Pingback.
    It uses a different protocol, though, and thus should be discoverable through its own link
    relation type.</note>
  </record>
  
  <record>
    <value>working-copy</value>
    <description>Points to a working copy for this resource.</description>
    <spec><xref type="rfc" data="rfc5829"/></spec>
  </record>
  
  <record>
    <value>working-copy-of</value>
    <description>Points to the versioned resource from which this
      working copy was obtained.
    </description>
    <spec><xref type="rfc" data="rfc5829"/></spec>
  </record>
 
</registry>
  
  <people/>
</registry>