R5-iana-link-relations-for-R4
type: ValueSet
node role: treeRoot
id:
  v: R5-iana-link-relations-for-R4
text:
  status:
    v: generated
  div:
    v: Generated Narrative: ValueSet R5-iana-link-relations-for-R4 This value set expansion contains 120 concepts. System Version Code Display Definition http://hl7.org/fhir/CodeSystem/iana-link-relations 5.0.0 P3Pv1 Refers to a P3P privacy policy for the context. Refers to a P3P privacy policy for the context. http://hl7.org/fhir/CodeSystem/iana-link-relations 5.0.0 about Refers to a resource that is the subject of the link's context. Refers to a resource that is the subject of the link's context. http://hl7.org/fhir/CodeSystem/iana-link-relations 5.0.0 acl Asserts that the link target provides an access control description for the link context. Asserts that the link target provides an access control description for the link context. http://hl7.org/fhir/CodeSystem/iana-link-relations 5.0.0 alternate Refers to a substitute for this context Refers to a substitute for this context http://hl7.org/fhir/CodeSystem/iana-link-relations 5.0.0 amphtml Used to reference alternative content that uses the AMP profile of the HTML format. Used to reference alternative content that uses the AMP profile of the HTML format. http://hl7.org/fhir/CodeSystem/iana-link-relations 5.0.0 appendix Refers to an appendix. Refers to an appendix. http://hl7.org/fhir/CodeSystem/iana-link-relations 5.0.0 apple-touch-icon Refers to an icon for the context. Synonym for icon. Refers to an icon for the context. Synonym for icon. http://hl7.org/fhir/CodeSystem/iana-link-relations 5.0.0 apple-touch-startup-image Refers to a launch screen for the context. Refers to a launch screen for the context. http://hl7.org/fhir/CodeSystem/iana-link-relations 5.0.0 archives Refers to a collection of records, documents, or other materials of historical interest. Refers to a collection of records, documents, or other materials of historical interest. http://hl7.org/fhir/CodeSystem/iana-link-relations 5.0.0 author Refers to the context's author. Refers to the context's author. http://hl7.org/fhir/CodeSystem/iana-link-relation…
extension:
  url:
    v: http://hl7.org/fhir/StructureDefinition/structuredefinition-fmm
    l: structuredefinition-fmm
  value: Integer
    v: 5
extension:
  url:
    v: http://hl7.org/fhir/StructureDefinition/structuredefinition-wg
    l: structuredefinition-wg
  value: Code
    v: fhir
extension:
  extension:
    url:
      v: packageId
      l: packageId
    value: Id
      v: hl7.fhir.uv.xver-r5.r4
  extension:
    url:
      v: version
      l: version
    value: String
      v: 0.1.0
  extension:
    url:
      v: uri
      l: uri
    value: Uri
      v: http://hl7.org/fhir/uv/xver/ImplementationGuide/hl7.fhir.uv.xver-r5.r4
      l: hl7.fhir.uv.xver-r5.r4
  url:
    v: http://hl7.org/fhir/StructureDefinition/package-source
    l: package-source
extension:
  url:
    v: http://hl7.org/fhir/StructureDefinition/structuredefinition-standards-status
    l: structuredefinition-standards-status
  value: Code
    v: trial-use
    extension:
      url:
        v: http://hl7.org/fhir/StructureDefinition/structuredefinition-conformance-derivedFrom
        l: structuredefinition-conformance-derivedFrom
      value: Canonical
        v: http://hl7.org/fhir/uv/xver/ImplementationGuide/hl7.fhir.uv.xver-r5.r4
        l: hl7.fhir.uv.xver-r5.r4
url:
  v: http://hl7.org/fhir/uv/xver/ValueSet/R5-iana-link-relations-for-R4
  l: R5-iana-link-relations-for-R4
version:
  v: 0.1.0
name:
  v: R5IanaLinkRelationsForR4
title:
  v: Cross-version ValueSet R5.LinkRelationTypes for use in FHIR R4
status:
  v: active
experimental:
  v: false
date:
  v: 2026-03-17T21:02:03.8104715+00:00
publisher:
  v: FHIR Infrastructure
contact:
  name:
    v: FHIR Infrastructure
  telecom:
    system:
      v: url
    value:
      v: http://www.hl7.org/Special/committees/fiwg
description:
  v: This cross-version ValueSet represents content from `http://hl7.org/fhir/ValueSet/iana-link-relations|5.0.0` for use in FHIR R4.
jurisdiction:
  coding:
    system:
      v: http://unstats.un.org/unsd/methods/m49/m49.htm
      l: m49.htm
    code:
      v: 001
    display:
      v: World
purpose:
  v: This value set is part of the cross-version definitions generated to enable use of the value set `http://hl7.org/fhir/ValueSet/iana-link-relations|5.0.0` as defined in FHIR R5 in FHIR R4. The source value set is bound to the following FHIR R5 elements: * `Bundle.link.relation` Note that all concepts are included in this cross-version definition because no concepts have compatible representations Following are the generation technical comments: FHIR ValueSet `http://hl7.org/fhir/ValueSet/iana-link-relations|5.0.0`, defined in FHIR R5 does not have any mapping to FHIR R4
compose:
  include:
    system:
      v: http://hl7.org/fhir/CodeSystem/iana-link-relations
      l: iana-link-relations
    version:
      v: 5.0.0
    concept:
      code:
        v: P3Pv1
      display:
        v: Refers to a P3P privacy policy for the context.
    concept:
      code:
        v: about
      display:
        v: Refers to a resource that is the subject of the link's context.
    concept:
      code:
        v: acl
      display:
        v: Asserts that the link target provides an access control description for the link context.
    concept:
      code:
        v: alternate
      display:
        v: Refers to a substitute for this context
    concept:
      code:
        v: amphtml
      display:
        v: Used to reference alternative content that uses the AMP profile of the HTML format.
    concept:
      code:
        v: appendix
      display:
        v: Refers to an appendix.
    concept:
      code:
        v: apple-touch-icon
      display:
        v: Refers to an icon for the context. Synonym for icon.
    concept:
      code:
        v: apple-touch-startup-image
      display:
        v: Refers to a launch screen for the context.
    concept:
      code:
        v: archives
      display:
        v: Refers to a collection of records, documents, or other materials of historical interest.
    concept:
      code:
        v: author
      display:
        v: Refers to the context's author.
    concept:
      code:
        v: blocked-by
      display:
        v: Identifies the entity that blocks access to a resource following receipt of a legal demand.
    concept:
      code:
        v: bookmark
      display:
        v: Gives a permanent link to use for bookmarking purposes.
    concept:
      code:
        v: canonical
      display:
        v: Designates the preferred version of a resource (the IRI and its contents).
    concept:
      code:
        v: chapter
      display:
        v: Refers to a chapter in a collection of resources.
    concept:
      code:
        v: cite-as
      display:
        v: Indicates that the link target is preferred over the link context for the purpose of permanent citation.
    concept:
      code:
        v: collection
      display:
        v: The target IRI points to a resource which represents the collection resource for the context IRI.
    concept:
      code:
        v: contents
      display:
        v: Refers to a table of contents.
    concept:
      code:
        v: convertedFrom
      display:
        v: 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".
    concept:
      code:
        v: copyright
      display:
        v: Refers to a copyright statement that applies to the link's context.
    concept:
      code:
        v: create-form
      display:
        v: The target IRI points to a resource where a submission form can be obtained.

code:
  v: current
display:
  v: Refers to a resource containing the most recent item(s) in a collection of resources.

code:
  v: describedby
display:
  v: Refers to a resource providing information about the link's context.

code:
  v: describes
display:
  v: 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.

code:
  v: disclosure
display:
  v: Refers to a list of patent disclosures made with respect to material for which 'disclosure' relation is specified.

code:
  v: dns-prefetch
display:
  v: 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.

code:
  v: duplicate
display:
  v: Refers to a resource whose available representations are byte-for-byte identical with the corresponding representations of the context IRI.

code:
  v: edit
display:
  v: Refers to a resource that can be used to edit the link's context.

code:
  v: edit-form
display:
  v: The target IRI points to a resource where a submission form for editing associated resource can be obtained.

code:
  v: edit-media
display:
  v: Refers to a resource that can be used to edit media associated with the link's context.

code:
  v: enclosure
display:
  v: Identifies a related resource that is potentially large and might require special handling.

code:
  v: external
display:
  v: Refers to a resource that is not part of the same site as the current context.

code:
  v: first
display:
  v: An IRI that refers to the furthest preceding resource in a series of resources.

code:
  v: glossary
display:
  v: Refers to a glossary of terms.

code:
  v: help
display:
  v: Refers to context-sensitive help.

code:
  v: hosts
display:
  v: Refers to a resource hosted by the server indicated by the link context.

code:
  v: hub
display:
  v: Refers to a hub that enables registration for notification of updates to the context.

code:
  v: icon
display:
  v: Refers to an icon representing the link's context.

code:
  v: index
display:
  v: Refers to an index.

code:
  v: intervalAfter
display:
  v: refers to a resource associated with a time interval that ends before the beginning of the time interval associated with the context resource

code:
  v: intervalBefore
display:
  v: refers to a resource associated with a time interval that begins after the end of the time interval associated with the context resource

code:
  v: intervalContains
display:
  v: 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

code:
  v: intervalDisjoint
display:
  v: 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

code:
  v: intervalDuring
display:
  v: 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

code:
  v: intervalEquals
display:
  v: 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

code:
  v: intervalFinishedBy
display:
  v: 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

code:
  v: intervalFinishes
display:
  v: 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

code:
  v: intervalIn
display:
  v: 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

code:
  v: intervalMeets
display:
  v: refers to a resource associated with a time interval whose beginning coincides with the end of the time interval associated with the context resource

code:
  v: intervalMetBy
display:
  v: refers to a resource associated with a time interval whose end coincides with the beginning of the time interval associated with the context resource

code:
  v: intervalOverlappedBy
display:
  v: 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

code:
  v: intervalOverlaps
display:
  v: 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

code:
  v: intervalStartedBy
display:
  v: 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

code:
  v: intervalStarts
display:
  v: 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

code:
  v: item
display:
  v: The target IRI points to a resource that is a member of the collection represented by the context IRI.

code:
  v: last
display:
  v: An IRI that refers to the furthest following resource in a series of resources.

code:
  v: latest-version
display:
  v: Points to a resource containing the latest (e.g., current) version of the context.

code:
  v: license
display:
  v: Refers to a license associated with this context.

code:
  v: linkset
display:
  v: The link target of a link with the "linkset" relation type provides a set of links, including links in which the link context of the link participates.

code:
  v: lrdd
display:
  v: Refers to further information about the link's context, expressed as a LRDD ("Link-based Resource Descriptor Document") resource. See 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.

code:
  v: manifest
display:
  v: Links to a manifest file for the context.

code:
  v: mask-icon
display:
  v: Refers to a mask that can be applied to the icon for the context.

code:
  v: media-feed
display:
  v: Refers to a feed of personalised media recommendations relevant to the link context.

code:
  v: memento
display:
  v: The Target IRI points to a Memento, a fixed resource that will not change state anymore.

code:
  v: micropub
display:
  v: Links to the context's Micropub endpoint.

code:
  v: modulepreload
display:
  v: Refers to a module that the user agent is to preemptively fetch and store for use in the current context.

code:
  v: monitor
display:
  v: Refers to a resource that can be used to monitor changes in an HTTP resource.

code:
  v: monitor-group
display:
  v: Refers to a resource that can be used to monitor changes in a specified group of HTTP resources.

code:
  v: next
display:
  v: Indicates that the link's context is a part of a series, and that the next in the series is the link target.

code:
  v: next-archive
display:
  v: Refers to the immediately following archive resource.

code:
  v: nofollow
display:
  v: Indicates that the context’s original author or publisher does not endorse the link target.

code:
  v: noopener
display:
  v: Indicates that any newly created top-level browsing context which results from following the link will not be an auxiliary browsing context.

code:
  v: noreferrer
display:
  v: Indicates that no referrer information is to be leaked when following the link.

code:
  v: opener
display:
  v: Indicates that any newly created top-level browsing context which results from following the link will be an auxiliary browsing context.

code:
  v: openid2.local_id
display:
  v: Refers to an OpenID Authentication server on which the context relies for an assertion that the end user controls an Identifier.

code:
  v: openid2.provider
display:
  v: Refers to a resource which accepts OpenID Authentication protocol messages for the context.

code:
  v: original
display:
  v: The Target IRI points to an Original Resource.

code:
  v: payment
display:
  v: Indicates a resource where payment is accepted.

code:
  v: pingback
display:
  v: Gives the address of the pingback resource for the link context.

code:
  v: preconnect
display:
  v: 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.

code:
  v: predecessor-version
display:
  v: Points to a resource containing the predecessor version in the version history.

code:
  v: prefetch
display:
  v: 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.

code:
  v: preload
display:
  v: Refers to a resource that should be loaded early in the processing of the link's context, without blocking rendering.

code:
  v: prerender
display:
  v: 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.

code:
  v: prev
display:
  v: Indicates that the link's context is a part of a series, and that the previous in the series is the link target.

code:
  v: prev-archive
display:
  v: Refers to the immediately preceding archive resource.

code:
  v: preview
display:
  v: Refers to a resource that provides a preview of the link's context.

code:
  v: previous
display:
  v: Refers to the previous resource in an ordered series of resources. Synonym for "prev".

code:
  v: privacy-policy
display:
  v: Refers to a privacy policy associated with the link's context.

code:
  v: profile
display:
  v: Identifying that a resource representation conforms to a certain profile, without affecting the non-profile semantics of the resource representation.

code:
  v: publication
display:
  v: Links to a publication manifest. A manifest represents structured information about a publication, such as informative metadata, a list of resources, and a default reading order.

code:
  v: related
display:
  v: Identifies a related resource.

code:
  v: replies
display:
  v: Identifies a resource that is a reply to the context of the link.

code:
  v: restconf
display:
  v: 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.

code:
  v: ruleinput
display:
  v: The resource identified by the link target provides an input value to an instance of a rule, where the resource which represents the rule instance is identified by the link context.

code:
  v: search
display:
  v: Refers to a resource that can be used to search through the link's context and related resources.

code:
  v: section
display:
  v: Refers to a section in a collection of resources.

code:
  v: self
display:
  v: Conveys an identifier for the link's context.

code:
  v: service
display:
  v: Indicates a URI that can be used to retrieve a service document.

code:
  v: service-desc
display:
  v: Identifies service description for the context that is primarily intended for consumption by machines.

code:
  v: service-doc
display:
  v: Identifies service documentation for the context that is primarily intended for human consumption.

code:
  v: service-meta
display:
  v: Identifies general metadata for the context that is primarily intended for consumption by machines.

code:
  v: sponsored
display:
  v: Refers to a resource that is within a context that is sponsored (such as advertising or another compensation agreement).

code:
  v: start
display:
  v: Refers to the first resource in a collection of resources.

code:
  v: status
display:
  v: Identifies a resource that represents the context's status.

code:
  v: stylesheet
display:
  v: Refers to a stylesheet.

code:
  v: subsection
display:
  v: Refers to a resource serving as a subsection in a collection of resources.

code:
  v: successor-version
display:
  v: Points to a resource containing the successor version in the version history.

code:
  v: sunset
display:
  v: Identifies a resource that provides information about the context's retirement policy.

code:
  v: tag
display:
  v: Gives a tag (identified by the given address) that applies to the current document.

code:
  v: terms-of-service
display:
  v: Refers to the terms of service associated with the link's context.

code:
  v: timegate
display:
  v: The Target IRI points to a TimeGate for an Original Resource.

code:
  v: timemap
display:
  v: The Target IRI points to a TimeMap for an Original Resource.

code:
  v: type
display:
  v: Refers to a resource identifying the abstract semantic type of which the link's context is considered to be an instance.

code:
  v: ugc
display:
  v: Refers to a resource that is within a context that is User Generated Content.

code:
  v: up
display:
  v: Refers to a parent document in a hierarchy of documents.

code:
  v: version-history
display:
  v: Points to a resource containing the version history for the context.

code:
  v: via
display:
  v: Identifies a resource that is the source of the information in the link's context.

code:
  v: webmention
display:
  v: Identifies a target URI that supports the Webmention protocol. 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.

code:
  v: working-copy
display:
  v: Points to a working copy for this resource.

code:
  v: working-copy-of
display:
  v: Points to the versioned resource from which this working copy was obtained.

timestamp:
  v: 2026-03-17T21:02:03.8104715+00:00
contains:
  system:
    v: http://hl7.org/fhir/CodeSystem/iana-link-relations
    l: iana-link-relations
  version:
    v: 5.0.0
  code:
    v: P3Pv1
  display:
    v: Refers to a P3P privacy policy for the context.
contains:
  system:
    v: http://hl7.org/fhir/CodeSystem/iana-link-relations
    l: iana-link-relations
  version:
    v: 5.0.0
  code:
    v: about
  display:
    v: Refers to a resource that is the subject of the link's context.
contains:
  system:
    v: http://hl7.org/fhir/CodeSystem/iana-link-relations
    l: iana-link-relations
  version:
    v: 5.0.0
  code:
    v: acl
  display:
    v: Asserts that the link target provides an access control description for the link context.
contains:
  system:
    v: http://hl7.org/fhir/CodeSystem/iana-link-relations
    l: iana-link-relations
  version:
    v: 5.0.0
  code:
    v: alternate
  display:
    v: Refers to a substitute for this context
contains:
  system:
    v: http://hl7.org/fhir/CodeSystem/iana-link-relations
    l: iana-link-relations
  version:
    v: 5.0.0
  code:
    v: amphtml
  display:
    v: Used to reference alternative content that uses the AMP profile of the HTML format.
contains:
  system:
    v: http://hl7.org/fhir/CodeSystem/iana-link-relations
    l: iana-link-relations
  version:
    v: 5.0.0
  code:
    v: appendix
  display:
    v: Refers to an appendix.
contains:
  system:
    v: http://hl7.org/fhir/CodeSystem/iana-link-relations
    l: iana-link-relations
  version:
    v: 5.0.0
  code:
    v: apple-touch-icon
  display:
    v: Refers to an icon for the context. Synonym for icon.
contains:
  system:
    v: http://hl7.org/fhir/CodeSystem/iana-link-relations
    l: iana-link-relations
  version:
    v: 5.0.0
  code:
    v: apple-touch-startup-image
  display:
    v: Refers to a launch screen for the context.
contains:
  system:
    v: http://hl7.org/fhir/CodeSystem/iana-link-relations
    l: iana-link-relations
  version:
    v: 5.0.0
  code:
    v: archives
  display:
    v: Refers to a collection of records, documents, or other materials of historical interest.
contains:
  system:
    v: http://hl7.org/fhir/CodeSystem/iana-link-relations
    l: iana-link-relations
  version:
    v: 5.0.0
  code:
    v: author
  display:
    v: Refers to the context's author.
contains:
  system:
    v: http://hl7.org/fhir/CodeSystem/iana-link-relations
    l: iana-link-relations
  version:
    v: 5.0.0
  code:
    v: blocked-by
  display:
    v: Identifies the entity that blocks access to a resource following receipt of a legal demand.
contains:
  system:
    v: http://hl7.org/fhir/CodeSystem/iana-link-relations
    l: iana-link-relations
  version:
    v: 5.0.0
  code:
    v: bookmark
  display:
    v: Gives a permanent link to use for bookmarking purposes.
contains:
  system:
    v: http://hl7.org/fhir/CodeSystem/iana-link-relations
    l: iana-link-relations
  version:
    v: 5.0.0
  code:
    v: canonical
  display:
    v: Designates the preferred version of a resource (the IRI and its contents).
contains:
  system:
    v: http://hl7.org/fhir/CodeSystem/iana-link-relations
    l: iana-link-relations
  version:
    v: 5.0.0
  code:
    v: chapter
  display:
    v: Refers to a chapter in a collection of resources.
contains:
  system:
    v: http://hl7.org/fhir/CodeSystem/iana-link-relations
    l: iana-link-relations
  version:
    v: 5.0.0
  code:
    v: cite-as
  display:
    v: Indicates that the link target is preferred over the link context for the purpose of permanent citation.
contains:
  system:
    v: http://hl7.org/fhir/CodeSystem/iana-link-relations
    l: iana-link-relations
  version:
    v: 5.0.0
  code:
    v: collection
  display:
    v: The target IRI points to a resource which represents the collection resource for the context IRI.
contains:
  system:
    v: http://hl7.org/fhir/CodeSystem/iana-link-relations
    l: iana-link-relations
  version:
    v: 5.0.0
  code:
    v: contents
  display:
    v: Refers to a table of contents.
contains:
  system:
    v: http://hl7.org/fhir/CodeSystem/iana-link-relations
    l: iana-link-relations
  version:
    v: 5.0.0
  code:
    v: convertedFrom
  display:
    v: 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".
contains:
  system:
    v: http://hl7.org/fhir/CodeSystem/iana-link-relations
    l: iana-link-relations
  version:
    v: 5.0.0
  code:
    v: copyright
  display:
    v: Refers to a copyright statement that applies to the link's context.
contains:
  system:
    v: http://hl7.org/fhir/CodeSystem/iana-link-relations
    l: iana-link-relations
  version:
    v: 5.0.0
  code:
    v: create-form
  display:
    v: The target IRI points to a resource where a submission form can be obtained.

system:
  v: http://hl7.org/fhir/CodeSystem/iana-link-relations
  l: iana-link-relations
version:
  v: 5.0.0
code:
  v: current
display:
  v: Refers to a resource containing the most recent item(s) in a collection of resources.

system:
  v: http://hl7.org/fhir/CodeSystem/iana-link-relations
  l: iana-link-relations
version:
  v: 5.0.0
code:
  v: describedby
display:
  v: Refers to a resource providing information about the link's context.

system:
  v: http://hl7.org/fhir/CodeSystem/iana-link-relations
  l: iana-link-relations
version:
  v: 5.0.0
code:
  v: describes
display:
  v: 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.

system:
  v: http://hl7.org/fhir/CodeSystem/iana-link-relations
  l: iana-link-relations
version:
  v: 5.0.0
code:
  v: disclosure
display:
  v: Refers to a list of patent disclosures made with respect to material for which 'disclosure' relation is specified.

system:
  v: http://hl7.org/fhir/CodeSystem/iana-link-relations
  l: iana-link-relations
version:
  v: 5.0.0
code:
  v: dns-prefetch
display:
  v: 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.

system:
  v: http://hl7.org/fhir/CodeSystem/iana-link-relations
  l: iana-link-relations
version:
  v: 5.0.0
code:
  v: duplicate
display:
  v: Refers to a resource whose available representations are byte-for-byte identical with the corresponding representations of the context IRI.

system:
  v: http://hl7.org/fhir/CodeSystem/iana-link-relations
  l: iana-link-relations
version:
  v: 5.0.0
code:
  v: edit
display:
  v: Refers to a resource that can be used to edit the link's context.

system:
  v: http://hl7.org/fhir/CodeSystem/iana-link-relations
  l: iana-link-relations
version:
  v: 5.0.0
code:
  v: edit-form
display:
  v: The target IRI points to a resource where a submission form for editing associated resource can be obtained.

system:
  v: http://hl7.org/fhir/CodeSystem/iana-link-relations
  l: iana-link-relations
version:
  v: 5.0.0
code:
  v: edit-media
display:
  v: Refers to a resource that can be used to edit media associated with the link's context.

system:
  v: http://hl7.org/fhir/CodeSystem/iana-link-relations
  l: iana-link-relations
version:
  v: 5.0.0
code:
  v: enclosure
display:
  v: Identifies a related resource that is potentially large and might require special handling.

system:
  v: http://hl7.org/fhir/CodeSystem/iana-link-relations
  l: iana-link-relations
version:
  v: 5.0.0
code:
  v: external
display:
  v: Refers to a resource that is not part of the same site as the current context.

system:
  v: http://hl7.org/fhir/CodeSystem/iana-link-relations
  l: iana-link-relations
version:
  v: 5.0.0
code:
  v: first
display:
  v: An IRI that refers to the furthest preceding resource in a series of resources.

system:
  v: http://hl7.org/fhir/CodeSystem/iana-link-relations
  l: iana-link-relations
version:
  v: 5.0.0
code:
  v: glossary
display:
  v: Refers to a glossary of terms.

system:
  v: http://hl7.org/fhir/CodeSystem/iana-link-relations
  l: iana-link-relations
version:
  v: 5.0.0
code:
  v: help
display:
  v: Refers to context-sensitive help.

system:
  v: http://hl7.org/fhir/CodeSystem/iana-link-relations
  l: iana-link-relations
version:
  v: 5.0.0
code:
  v: hosts
display:
  v: Refers to a resource hosted by the server indicated by the link context.

system:
  v: http://hl7.org/fhir/CodeSystem/iana-link-relations
  l: iana-link-relations
version:
  v: 5.0.0
code:
  v: hub
display:
  v: Refers to a hub that enables registration for notification of updates to the context.

system:
  v: http://hl7.org/fhir/CodeSystem/iana-link-relations
  l: iana-link-relations
version:
  v: 5.0.0
code:
  v: icon
display:
  v: Refers to an icon representing the link's context.

system:
  v: http://hl7.org/fhir/CodeSystem/iana-link-relations
  l: iana-link-relations
version:
  v: 5.0.0
code:
  v: index
display:
  v: Refers to an index.

system:
  v: http://hl7.org/fhir/CodeSystem/iana-link-relations
  l: iana-link-relations
version:
  v: 5.0.0
code:
  v: intervalAfter
display:
  v: refers to a resource associated with a time interval that ends before the beginning of the time interval associated with the context resource

system:
  v: http://hl7.org/fhir/CodeSystem/iana-link-relations
  l: iana-link-relations
version:
  v: 5.0.0
code:
  v: intervalBefore
display:
  v: refers to a resource associated with a time interval that begins after the end of the time interval associated with the context resource

system:
  v: http://hl7.org/fhir/CodeSystem/iana-link-relations
  l: iana-link-relations
version:
  v: 5.0.0
code:
  v: intervalContains
display:
  v: 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

system:
  v: http://hl7.org/fhir/CodeSystem/iana-link-relations
  l: iana-link-relations
version:
  v: 5.0.0
code:
  v: intervalDisjoint
display:
  v: 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

system:
  v: http://hl7.org/fhir/CodeSystem/iana-link-relations
  l: iana-link-relations
version:
  v: 5.0.0
code:
  v: intervalDuring
display:
  v: 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

system:
  v: http://hl7.org/fhir/CodeSystem/iana-link-relations
  l: iana-link-relations
version:
  v: 5.0.0
code:
  v: intervalEquals
display:
  v: 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

system:
  v: http://hl7.org/fhir/CodeSystem/iana-link-relations
  l: iana-link-relations
version:
  v: 5.0.0
code:
  v: intervalFinishedBy
display:
  v: 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

system:
  v: http://hl7.org/fhir/CodeSystem/iana-link-relations
  l: iana-link-relations
version:
  v: 5.0.0
code:
  v: intervalFinishes
display:
  v: 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

system:
  v: http://hl7.org/fhir/CodeSystem/iana-link-relations
  l: iana-link-relations
version:
  v: 5.0.0
code:
  v: intervalIn
display:
  v: 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

system:
  v: http://hl7.org/fhir/CodeSystem/iana-link-relations
  l: iana-link-relations
version:
  v: 5.0.0
code:
  v: intervalMeets
display:
  v: refers to a resource associated with a time interval whose beginning coincides with the end of the time interval associated with the context resource

system:
  v: http://hl7.org/fhir/CodeSystem/iana-link-relations
  l: iana-link-relations
version:
  v: 5.0.0
code:
  v: intervalMetBy
display:
  v: refers to a resource associated with a time interval whose end coincides with the beginning of the time interval associated with the context resource

system:
  v: http://hl7.org/fhir/CodeSystem/iana-link-relations
  l: iana-link-relations
version:
  v: 5.0.0
code:
  v: intervalOverlappedBy
display:
  v: 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

system:
  v: http://hl7.org/fhir/CodeSystem/iana-link-relations
  l: iana-link-relations
version:
  v: 5.0.0
code:
  v: intervalOverlaps
display:
  v: 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

system:
  v: http://hl7.org/fhir/CodeSystem/iana-link-relations
  l: iana-link-relations
version:
  v: 5.0.0
code:
  v: intervalStartedBy
display:
  v: 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

system:
  v: http://hl7.org/fhir/CodeSystem/iana-link-relations
  l: iana-link-relations
version:
  v: 5.0.0
code:
  v: intervalStarts
display:
  v: 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

system:
  v: http://hl7.org/fhir/CodeSystem/iana-link-relations
  l: iana-link-relations
version:
  v: 5.0.0
code:
  v: item
display:
  v: The target IRI points to a resource that is a member of the collection represented by the context IRI.

system:
  v: http://hl7.org/fhir/CodeSystem/iana-link-relations
  l: iana-link-relations
version:
  v: 5.0.0
code:
  v: last
display:
  v: An IRI that refers to the furthest following resource in a series of resources.

system:
  v: http://hl7.org/fhir/CodeSystem/iana-link-relations
  l: iana-link-relations
version:
  v: 5.0.0
code:
  v: latest-version
display:
  v: Points to a resource containing the latest (e.g., current) version of the context.

system:
  v: http://hl7.org/fhir/CodeSystem/iana-link-relations
  l: iana-link-relations
version:
  v: 5.0.0
code:
  v: license
display:
  v: Refers to a license associated with this context.

system:
  v: http://hl7.org/fhir/CodeSystem/iana-link-relations
  l: iana-link-relations
version:
  v: 5.0.0
code:
  v: linkset
display:
  v: The link target of a link with the "linkset" relation type provides a set of links, including links in which the link context of the link participates.

system:
  v: http://hl7.org/fhir/CodeSystem/iana-link-relations
  l: iana-link-relations
version:
  v: 5.0.0
code:
  v: lrdd
display:
  v: Refers to further information about the link's context, expressed as a LRDD ("Link-based Resource Descriptor Document") resource. See 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.

system:
  v: http://hl7.org/fhir/CodeSystem/iana-link-relations
  l: iana-link-relations
version:
  v: 5.0.0
code:
  v: manifest
display:
  v: Links to a manifest file for the context.

system:
  v: http://hl7.org/fhir/CodeSystem/iana-link-relations
  l: iana-link-relations
version:
  v: 5.0.0
code:
  v: mask-icon
display:
  v: Refers to a mask that can be applied to the icon for the context.

system:
  v: http://hl7.org/fhir/CodeSystem/iana-link-relations
  l: iana-link-relations
version:
  v: 5.0.0
code:
  v: media-feed
display:
  v: Refers to a feed of personalised media recommendations relevant to the link context.

system:
  v: http://hl7.org/fhir/CodeSystem/iana-link-relations
  l: iana-link-relations
version:
  v: 5.0.0
code:
  v: memento
display:
  v: The Target IRI points to a Memento, a fixed resource that will not change state anymore.

system:
  v: http://hl7.org/fhir/CodeSystem/iana-link-relations
  l: iana-link-relations
version:
  v: 5.0.0
code:
  v: micropub
display:
  v: Links to the context's Micropub endpoint.

system:
  v: http://hl7.org/fhir/CodeSystem/iana-link-relations
  l: iana-link-relations
version:
  v: 5.0.0
code:
  v: modulepreload
display:
  v: Refers to a module that the user agent is to preemptively fetch and store for use in the current context.

system:
  v: http://hl7.org/fhir/CodeSystem/iana-link-relations
  l: iana-link-relations
version:
  v: 5.0.0
code:
  v: monitor
display:
  v: Refers to a resource that can be used to monitor changes in an HTTP resource.

system:
  v: http://hl7.org/fhir/CodeSystem/iana-link-relations
  l: iana-link-relations
version:
  v: 5.0.0
code:
  v: monitor-group
display:
  v: Refers to a resource that can be used to monitor changes in a specified group of HTTP resources.

system:
  v: http://hl7.org/fhir/CodeSystem/iana-link-relations
  l: iana-link-relations
version:
  v: 5.0.0
code:
  v: next
display:
  v: Indicates that the link's context is a part of a series, and that the next in the series is the link target.

system:
  v: http://hl7.org/fhir/CodeSystem/iana-link-relations
  l: iana-link-relations
version:
  v: 5.0.0
code:
  v: next-archive
display:
  v: Refers to the immediately following archive resource.

system:
  v: http://hl7.org/fhir/CodeSystem/iana-link-relations
  l: iana-link-relations
version:
  v: 5.0.0
code:
  v: nofollow
display:
  v: Indicates that the context’s original author or publisher does not endorse the link target.

system:
  v: http://hl7.org/fhir/CodeSystem/iana-link-relations
  l: iana-link-relations
version:
  v: 5.0.0
code:
  v: noopener
display:
  v: Indicates that any newly created top-level browsing context which results from following the link will not be an auxiliary browsing context.

system:
  v: http://hl7.org/fhir/CodeSystem/iana-link-relations
  l: iana-link-relations
version:
  v: 5.0.0
code:
  v: noreferrer
display:
  v: Indicates that no referrer information is to be leaked when following the link.

system:
  v: http://hl7.org/fhir/CodeSystem/iana-link-relations
  l: iana-link-relations
version:
  v: 5.0.0
code:
  v: opener
display:
  v: Indicates that any newly created top-level browsing context which results from following the link will be an auxiliary browsing context.

system:
  v: http://hl7.org/fhir/CodeSystem/iana-link-relations
  l: iana-link-relations
version:
  v: 5.0.0
code:
  v: openid2.local_id
display:
  v: Refers to an OpenID Authentication server on which the context relies for an assertion that the end user controls an Identifier.

system:
  v: http://hl7.org/fhir/CodeSystem/iana-link-relations
  l: iana-link-relations
version:
  v: 5.0.0
code:
  v: openid2.provider
display:
  v: Refers to a resource which accepts OpenID Authentication protocol messages for the context.

system:
  v: http://hl7.org/fhir/CodeSystem/iana-link-relations
  l: iana-link-relations
version:
  v: 5.0.0
code:
  v: original
display:
  v: The Target IRI points to an Original Resource.

system:
  v: http://hl7.org/fhir/CodeSystem/iana-link-relations
  l: iana-link-relations
version:
  v: 5.0.0
code:
  v: payment
display:
  v: Indicates a resource where payment is accepted.

system:
  v: http://hl7.org/fhir/CodeSystem/iana-link-relations
  l: iana-link-relations
version:
  v: 5.0.0
code:
  v: pingback
display:
  v: Gives the address of the pingback resource for the link context.

system:
  v: http://hl7.org/fhir/CodeSystem/iana-link-relations
  l: iana-link-relations
version:
  v: 5.0.0
code:
  v: preconnect
display:
  v: 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.

system:
  v: http://hl7.org/fhir/CodeSystem/iana-link-relations
  l: iana-link-relations
version:
  v: 5.0.0
code:
  v: predecessor-version
display:
  v: Points to a resource containing the predecessor version in the version history.

system:
  v: http://hl7.org/fhir/CodeSystem/iana-link-relations
  l: iana-link-relations
version:
  v: 5.0.0
code:
  v: prefetch
display:
  v: 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.

system:
  v: http://hl7.org/fhir/CodeSystem/iana-link-relations
  l: iana-link-relations
version:
  v: 5.0.0
code:
  v: preload
display:
  v: Refers to a resource that should be loaded early in the processing of the link's context, without blocking rendering.

system:
  v: http://hl7.org/fhir/CodeSystem/iana-link-relations
  l: iana-link-relations
version:
  v: 5.0.0
code:
  v: prerender
display:
  v: 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.

system:
  v: http://hl7.org/fhir/CodeSystem/iana-link-relations
  l: iana-link-relations
version:
  v: 5.0.0
code:
  v: prev
display:
  v: Indicates that the link's context is a part of a series, and that the previous in the series is the link target.

system:
  v: http://hl7.org/fhir/CodeSystem/iana-link-relations
  l: iana-link-relations
version:
  v: 5.0.0
code:
  v: prev-archive
display:
  v: Refers to the immediately preceding archive resource.

system:
  v: http://hl7.org/fhir/CodeSystem/iana-link-relations
  l: iana-link-relations
version:
  v: 5.0.0
code:
  v: preview
display:
  v: Refers to a resource that provides a preview of the link's context.

system:
  v: http://hl7.org/fhir/CodeSystem/iana-link-relations
  l: iana-link-relations
version:
  v: 5.0.0
code:
  v: previous
display:
  v: Refers to the previous resource in an ordered series of resources. Synonym for "prev".

system:
  v: http://hl7.org/fhir/CodeSystem/iana-link-relations
  l: iana-link-relations
version:
  v: 5.0.0
code:
  v: privacy-policy
display:
  v: Refers to a privacy policy associated with the link's context.

system:
  v: http://hl7.org/fhir/CodeSystem/iana-link-relations
  l: iana-link-relations
version:
  v: 5.0.0
code:
  v: profile
display:
  v: Identifying that a resource representation conforms to a certain profile, without affecting the non-profile semantics of the resource representation.

system:
  v: http://hl7.org/fhir/CodeSystem/iana-link-relations
  l: iana-link-relations
version:
  v: 5.0.0
code:
  v: publication
display:
  v: Links to a publication manifest. A manifest represents structured information about a publication, such as informative metadata, a list of resources, and a default reading order.

system:
  v: http://hl7.org/fhir/CodeSystem/iana-link-relations
  l: iana-link-relations
version:
  v: 5.0.0
code:
  v: related
display:
  v: Identifies a related resource.

system:
  v: http://hl7.org/fhir/CodeSystem/iana-link-relations
  l: iana-link-relations
version:
  v: 5.0.0
code:
  v: replies
display:
  v: Identifies a resource that is a reply to the context of the link.

system:
  v: http://hl7.org/fhir/CodeSystem/iana-link-relations
  l: iana-link-relations
version:
  v: 5.0.0
code:
  v: restconf
display:
  v: 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.

system:
  v: http://hl7.org/fhir/CodeSystem/iana-link-relations
  l: iana-link-relations
version:
  v: 5.0.0
code:
  v: ruleinput
display:
  v: The resource identified by the link target provides an input value to an instance of a rule, where the resource which represents the rule instance is identified by the link context.

system:
  v: http://hl7.org/fhir/CodeSystem/iana-link-relations
  l: iana-link-relations
version:
  v: 5.0.0
code:
  v: search
display:
  v: Refers to a resource that can be used to search through the link's context and related resources.

system:
  v: http://hl7.org/fhir/CodeSystem/iana-link-relations
  l: iana-link-relations
version:
  v: 5.0.0
code:
  v: section
display:
  v: Refers to a section in a collection of resources.

system:
  v: http://hl7.org/fhir/CodeSystem/iana-link-relations
  l: iana-link-relations
version:
  v: 5.0.0
code:
  v: self
display:
  v: Conveys an identifier for the link's context.

system:
  v: http://hl7.org/fhir/CodeSystem/iana-link-relations
  l: iana-link-relations
version:
  v: 5.0.0
code:
  v: service
display:
  v: Indicates a URI that can be used to retrieve a service document.

system:
  v: http://hl7.org/fhir/CodeSystem/iana-link-relations
  l: iana-link-relations
version:
  v: 5.0.0
code:
  v: service-desc
display:
  v: Identifies service description for the context that is primarily intended for consumption by machines.

system:
  v: http://hl7.org/fhir/CodeSystem/iana-link-relations
  l: iana-link-relations
version:
  v: 5.0.0
code:
  v: service-doc
display:
  v: Identifies service documentation for the context that is primarily intended for human consumption.

system:
  v: http://hl7.org/fhir/CodeSystem/iana-link-relations
  l: iana-link-relations
version:
  v: 5.0.0
code:
  v: service-meta
display:
  v: Identifies general metadata for the context that is primarily intended for consumption by machines.

system:
  v: http://hl7.org/fhir/CodeSystem/iana-link-relations
  l: iana-link-relations
version:
  v: 5.0.0
code:
  v: sponsored
display:
  v: Refers to a resource that is within a context that is sponsored (such as advertising or another compensation agreement).

system:
  v: http://hl7.org/fhir/CodeSystem/iana-link-relations
  l: iana-link-relations
version:
  v: 5.0.0
code:
  v: start
display:
  v: Refers to the first resource in a collection of resources.

system:
  v: http://hl7.org/fhir/CodeSystem/iana-link-relations
  l: iana-link-relations
version:
  v: 5.0.0
code:
  v: status
display:
  v: Identifies a resource that represents the context's status.

system:
  v: http://hl7.org/fhir/CodeSystem/iana-link-relations
  l: iana-link-relations
version:
  v: 5.0.0
code:
  v: stylesheet
display:
  v: Refers to a stylesheet.

system:
  v: http://hl7.org/fhir/CodeSystem/iana-link-relations
  l: iana-link-relations
version:
  v: 5.0.0
code:
  v: subsection
display:
  v: Refers to a resource serving as a subsection in a collection of resources.

system:
  v: http://hl7.org/fhir/CodeSystem/iana-link-relations
  l: iana-link-relations
version:
  v: 5.0.0
code:
  v: successor-version
display:
  v: Points to a resource containing the successor version in the version history.

system:
  v: http://hl7.org/fhir/CodeSystem/iana-link-relations
  l: iana-link-relations
version:
  v: 5.0.0
code:
  v: sunset
display:
  v: Identifies a resource that provides information about the context's retirement policy.

system:
  v: http://hl7.org/fhir/CodeSystem/iana-link-relations
  l: iana-link-relations
version:
  v: 5.0.0
code:
  v: tag
display:
  v: Gives a tag (identified by the given address) that applies to the current document.

system:
  v: http://hl7.org/fhir/CodeSystem/iana-link-relations
  l: iana-link-relations
version:
  v: 5.0.0
code:
  v: terms-of-service
display:
  v: Refers to the terms of service associated with the link's context.

system:
  v: http://hl7.org/fhir/CodeSystem/iana-link-relations
  l: iana-link-relations
version:
  v: 5.0.0
code:
  v: timegate
display:
  v: The Target IRI points to a TimeGate for an Original Resource.

system:
  v: http://hl7.org/fhir/CodeSystem/iana-link-relations
  l: iana-link-relations
version:
  v: 5.0.0
code:
  v: timemap
display:
  v: The Target IRI points to a TimeMap for an Original Resource.

system:
  v: http://hl7.org/fhir/CodeSystem/iana-link-relations
  l: iana-link-relations
version:
  v: 5.0.0
code:
  v: type
display:
  v: Refers to a resource identifying the abstract semantic type of which the link's context is considered to be an instance.

system:
  v: http://hl7.org/fhir/CodeSystem/iana-link-relations
  l: iana-link-relations
version:
  v: 5.0.0
code:
  v: ugc
display:
  v: Refers to a resource that is within a context that is User Generated Content.

system:
  v: http://hl7.org/fhir/CodeSystem/iana-link-relations
  l: iana-link-relations
version:
  v: 5.0.0
code:
  v: up
display:
  v: Refers to a parent document in a hierarchy of documents.

system:
  v: http://hl7.org/fhir/CodeSystem/iana-link-relations
  l: iana-link-relations
version:
  v: 5.0.0
code:
  v: version-history
display:
  v: Points to a resource containing the version history for the context.

system:
  v: http://hl7.org/fhir/CodeSystem/iana-link-relations
  l: iana-link-relations
version:
  v: 5.0.0
code:
  v: via
display:
  v: Identifies a resource that is the source of the information in the link's context.

system:
  v: http://hl7.org/fhir/CodeSystem/iana-link-relations
  l: iana-link-relations
version:
  v: 5.0.0
code:
  v: webmention
display:
  v: Identifies a target URI that supports the Webmention protocol. 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.

system:
  v: http://hl7.org/fhir/CodeSystem/iana-link-relations
  l: iana-link-relations
version:
  v: 5.0.0
code:
  v: working-copy
display:
  v: Points to a working copy for this resource.

system:
  v: http://hl7.org/fhir/CodeSystem/iana-link-relations
  l: iana-link-relations
version:
  v: 5.0.0
code:
  v: working-copy-of
display:
  v: Points to the versioned resource from which this working copy was obtained.