R5-CodeSystem-element-map-to-R4
type: ConceptMap
node role: treeRoot
id:
  v: R5-CodeSystem-element-map-to-R4
text:
  status:
    v: generated
  div:
    v: Generated Narrative: ConceptMap R5-CodeSystem-element-map-to-R4 Mapping from http://hl7.org/fhir/5.0 to http://hl7.org/fhir/4.0 Group 1 Mapping from http://hl7.org/fhir/StructureDefinition/CodeSystem|5.0.0 to CodeSystemversion: 4.0.1) Source Code Relationship Target Code Comment CodeSystem.meta (meta) is equivalent to CodeSystem.meta Element `CodeSystem.meta` is mapped to FHIR R4 element `CodeSystem.meta` as `Equivalent`. CodeSystem.implicitRules (implicitRules) is equivalent to CodeSystem.implicitRules Element `CodeSystem.implicitRules` is mapped to FHIR R4 element `CodeSystem.implicitRules` as `Equivalent`. Asserting this rule set restricts the content to be only understood by a limited set of trading partners. This inherently limits the usefulness of the data in the long term. However, the existing health eco-system is highly fractured, and not yet ready to define, collect, and exchange data in a generally computable sense. Wherever possible, implementers and/or specification writers should avoid using this element. Often, when used, the URL is a reference to an implementation guide that defines these special rules as part of its narrative along with other profiles, value sets, etc. CodeSystem.language (language) is equivalent to CodeSystem.language Element `CodeSystem.language` is mapped to FHIR R4 element `CodeSystem.language` as `Equivalent`. Language is provided to support indexing and accessibility (typically, services such as text to speech use the language tag). The html language tag in the narrative applies to the narrative. The language tag on the resource may be used to specify the language of other presentations generated from the data in the resource. Not all the content has to be in the base language. The Resource.language should not be assumed to apply to the narrative automatically. If a language is specified, it should it also be specified on the div element in the html (see rules in HTML5 for information about the relationship between xml:lang an…
extension:
  url:
    v: http://hl7.org/fhir/StructureDefinition/structuredefinition-wg
    l: structuredefinition-wg
  value: Code
    v: fhir
extension:
  url:
    v: http://hl7.org/fhir/StructureDefinition/structuredefinition-fmm
    l: structuredefinition-fmm
  value: Integer
    v: 0
    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
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/ConceptMap/R5-CodeSystem-element-map-to-R4
  l: R5-CodeSystem-element-map-to-R4
version:
  v: 0.1.0
name:
  v: R5CodeSystemElementMapToR4
title:
  v: Cross-version mapping for FHIR R5 CodeSystem to FHIR R4 CodeSystem
status:
  v: active
experimental:
  v: false
date:
  v: 2026-03-17T16:04:44.662611-05:00
contact:
  name:
    v: FHIR Infrastructure
  telecom:
    system:
      v: url
    value:
      v: http://www.hl7.org/Special/committees/fiwg
description:
  v: This ConceptMap represents cross-version mappings for elements from a FHIR R5 CodeSystem to FHIR R4.
jurisdiction:
  coding:
    system:
      v: http://unstats.un.org/unsd/methods/m49/m49.htm
      l: m49.htm
    code:
      v: 001
    display:
      v: World
source: Canonical
  v: http://hl7.org/fhir/5.0
  l: http://hl7.org/fhir/5.0
target: Uri
  v: http://hl7.org/fhir/4.0
  l: http://hl7.org/fhir/4.0
group:
  source:
    v: http://hl7.org/fhir/StructureDefinition/CodeSystem
    l: CodeSystem
  source version:
    v: 5.0.0
  target:
    v: http://hl7.org/fhir/StructureDefinition/CodeSystem
    l: CodeSystem
  target version:
    v: 4.0.1
  element:
    code:
      v: CodeSystem.meta
    display:
      v: meta
    target:
      code:
        v: CodeSystem.meta
      display:
        v: CodeSystem.meta
      equivalence:
        v: equivalent
      comment:
        v: Element `CodeSystem.meta` is mapped to FHIR R4 element `CodeSystem.meta` as `Equivalent`.
  element:
    code:
      v: CodeSystem.implicitRules
    display:
      v: implicitRules
    target:
      code:
        v: CodeSystem.implicitRules
      display:
        v: CodeSystem.implicitRules
      equivalence:
        v: equivalent
      comment:
        v: Element `CodeSystem.implicitRules` is mapped to FHIR R4 element `CodeSystem.implicitRules` as `Equivalent`. Asserting this rule set restricts the content to be only understood by a limited set of trading partners. This inherently limits the usefulness of the data in the long term. However, the existing health eco-system is highly fractured, and not yet ready to define, collect, and exchange data in a generally computable sense. Wherever possible, implementers and/or specification writers should avoid using this element. Often, when used, the URL is a reference to an implementation guide that defines these special rules as part of its narrative along with other profiles, value sets, etc.
  element:
    code:
      v: CodeSystem.language
    display:
      v: language
    target:
      code:
        v: CodeSystem.language
      display:
        v: CodeSystem.language
      equivalence:
        v: equivalent
      comment:
        v: Element `CodeSystem.language` is mapped to FHIR R4 element `CodeSystem.language` as `Equivalent`. Language is provided to support indexing and accessibility (typically, services such as text to speech use the language tag). The html language tag in the narrative applies to the narrative. The language tag on the resource may be used to specify the language of other presentations generated from the data in the resource. Not all the content has to be in the base language. The Resource.language should not be assumed to apply to the narrative automatically. If a language is specified, it should it also be specified on the div element in the html (see rules in HTML5 for information about the relationship between xml:lang and the html lang attribute).
  element:
    code:
      v: CodeSystem.text
    display:
      v: text
    target:
      code:
        v: CodeSystem.text
      display:
        v: CodeSystem.text
      equivalence:
        v: equivalent
      comment:
        v: Element `CodeSystem.text` is mapped to FHIR R4 element `CodeSystem.text` as `Equivalent`. Contained resources do not have a narrative. Resources that are not contained SHOULD have a narrative. In some cases, a resource may only have text with little or no additional discrete data (as long as all minOccurs=1 elements are satisfied). This may be necessary for data from legacy systems where information is captured as a "text blob" or where text is additionally entered raw or narrated and encoded information is added later.
  element:
    code:
      v: CodeSystem.contained
    display:
      v: contained
    target:
      code:
        v: CodeSystem.contained
      display:
        v: CodeSystem.contained
      equivalence:
        v: equivalent
      comment:
        v: Element `CodeSystem.contained` is mapped to FHIR R4 element `CodeSystem.contained` as `Equivalent`. This should never be done when the content can be identified properly, as once identification is lost, it is extremely difficult (and context dependent) to restore it again. Contained resources may have profiles and tags in their meta elements, but SHALL NOT have security labels.
  element:
    code:
      v: CodeSystem.url
    display:
      v: url
    target:
      code:
        v: CodeSystem.url
      display:
        v: CodeSystem.url
      equivalence:
        v: equivalent
      comment:
        v: Element `CodeSystem.url` is mapped to FHIR R4 element `CodeSystem.url` as `Equivalent`. Can be a urn:uuid: or a urn:oid: but real http: addresses are preferred. Multiple instances may share the same URL if they have a distinct version. The determination of when to create a new version of a resource (same url, new version) vs. defining a new artifact is up to the author. Considerations for making this decision are found in [Technical and Business Versions](https://hl7.org/fhir/resource..html#versions). In some cases, the resource can no longer be found at the stated url, but the url itself cannot change. Implementations can use the [meta.source](https://hl7.org/fhir/resou.html#meta) element to indicate where the current master source of the resource can be found.
  element:
    code:
      v: CodeSystem.identifier
    display:
      v: identifier
    target:
      code:
        v: CodeSystem.identifier
      display:
        v: CodeSystem.identifier
      equivalence:
        v: equivalent
      comment:
        v: Element `CodeSystem.identifier` is mapped to FHIR R4 element `CodeSystem.identifier` as `Equivalent`. Typically, this is used for identifiers that can go in an HL7 V3 II (instance identifier) data type, and can then identify this code system outside of FHIR, where it is not possible to use the logical URI. Note that HL7 defines at least three identifiers for many of its code systems - the FHIR canonical URL, the OID and the V2 Table 0396 mnemonic code.
  element:
    code:
      v: CodeSystem.version
    display:
      v: version
    target:
      code:
        v: CodeSystem.version
      display:
        v: CodeSystem.version
      equivalence:
        v: equivalent
      comment:
        v: Element `CodeSystem.version` is mapped to FHIR R4 element `CodeSystem.version` as `Equivalent`. There may be different code system instances that have the same identifier but different versions. The version can be appended to the url in a reference to allow a reference to a particular business version of the code system with the format [url]|[version]. The version SHOULD NOT contain a '#' - see [Business Version](https://hl7.org/fhir/resource.h.html#bv-format).

code:
  v: CodeSystem.name
display:
  v: name
target:
  code:
    v: CodeSystem.name
  display:
    v: CodeSystem.name
  equivalence:
    v: equivalent
  comment:
    v: Element `CodeSystem.name` is mapped to FHIR R4 element `CodeSystem.name` as `Equivalent`. The name is not expected to be globally unique. The name should be a simple alphanumeric type name to ensure that it is machine-processing friendly.

code:
  v: CodeSystem.title
display:
  v: title
target:
  code:
    v: CodeSystem.title
  display:
    v: CodeSystem.title
  equivalence:
    v: equivalent
  comment:
    v: Element `CodeSystem.title` is mapped to FHIR R4 element `CodeSystem.title` as `Equivalent`. This name does not need to be machine-processing friendly and may contain punctuation, white-space, etc.

code:
  v: CodeSystem.status
display:
  v: status
target:
  code:
    v: CodeSystem.status
  display:
    v: CodeSystem.status
  equivalence:
    v: equivalent
  comment:
    v: Element `CodeSystem.status` is mapped to FHIR R4 element `CodeSystem.status` as `Equivalent`. Allows filtering of code systems that are appropriate for use versus not. See guidance around (not) making local changes to elements [here](https://hl7.org/fhir/canonicalreso.html#localization).

code:
  v: CodeSystem.experimental
display:
  v: experimental
target:
  code:
    v: CodeSystem.experimental
  display:
    v: CodeSystem.experimental
  equivalence:
    v: equivalent
  comment:
    v: Element `CodeSystem.experimental` is mapped to FHIR R4 element `CodeSystem.experimental` as `Equivalent`. Allows filtering of code systems that are appropriate for use versus not.

code:
  v: CodeSystem.date
display:
  v: date
target:
  code:
    v: CodeSystem.date
  display:
    v: CodeSystem.date
  equivalence:
    v: equivalent
  comment:
    v: Element `CodeSystem.date` is mapped to FHIR R4 element `CodeSystem.date` as `Equivalent`. The date is often not tracked until the resource is published, but may be present on draft content. Note that this is not the same as the resource last-modified-date, since the resource may be a secondary representation of the code system. Additional specific dates may be added as extensions or be found by consulting Provenances associated with past versions of the resource. See guidance around (not) making local changes to elements [here](https://hl7.org/fhir/canonicalreso.html#localization).

code:
  v: CodeSystem.publisher
display:
  v: publisher
target:
  code:
    v: CodeSystem.publisher
  display:
    v: CodeSystem.publisher
  equivalence:
    v: equivalent
  comment:
    v: Element `CodeSystem.publisher` is mapped to FHIR R4 element `CodeSystem.publisher` as `Equivalent`. Usually an organization but may be an individual. The publisher (or steward) of the code system is the organization or individual primarily responsible for the maintenance and upkeep of the code system. This is not necessarily the same individual or organization that developed and initially authored the content. The publisher is the primary point of contact for questions or issues with the code system. This item SHOULD be populated unless the information is available from context.

code:
  v: CodeSystem.contact
display:
  v: contact
target:
  code:
    v: CodeSystem.contact
  display:
    v: CodeSystem.contact
  equivalence:
    v: equivalent
  comment:
    v: Element `CodeSystem.contact` is mapped to FHIR R4 element `CodeSystem.contact` as `Equivalent`. May be a web site, an email address, a telephone number, etc. See guidance around (not) making local changes to elements [here](https://hl7.org/fhir/canonicalreso.html#localization).

code:
  v: CodeSystem.description
display:
  v: description
target:
  code:
    v: CodeSystem.description
  display:
    v: CodeSystem.description
  equivalence:
    v: equivalent
  comment:
    v: Element `CodeSystem.description` is mapped to FHIR R4 element `CodeSystem.description` as `Equivalent`. This description can be used to capture details such as comments about misuse, instructions for clinical use and interpretation, literature references, examples from the paper world, etc. It is not a rendering of the code system as conveyed in the 'text' field of the resource itself. This item SHOULD be populated unless the information is available from context (e.g. the language of the code system is presumed to be the predominant language in the place the code system was created).

code:
  v: CodeSystem.useContext
display:
  v: useContext
target:
  code:
    v: CodeSystem.useContext
  display:
    v: CodeSystem.useContext
  equivalence:
    v: equivalent
  comment:
    v: Element `CodeSystem.useContext` is mapped to FHIR R4 element `CodeSystem.useContext` as `Equivalent`. When multiple useContexts are specified, there is no expectation that all or any of the contexts apply.

code:
  v: CodeSystem.jurisdiction
display:
  v: jurisdiction
target:
  code:
    v: CodeSystem.jurisdiction
  display:
    v: CodeSystem.jurisdiction
  equivalence:
    v: equivalent
  comment:
    v: Element `CodeSystem.jurisdiction` is mapped to FHIR R4 element `CodeSystem.jurisdiction` as `Equivalent`. Element `CodeSystem.jurisdiction` has been flagged as deprecated. It may be possible for the code system to be used in jurisdictions other than those for which it was originally designed or intended. DEPRECATION NOTE: For consistency, implementations are encouraged to migrate to using the new 'jurisdiction' code in the useContext element. (I.e. useContext.code indicating http://terminology.hl7.org/CodeSystem/usage-context-type#jurisdiction and useContext.valueCodeableConcept indicating the jurisdiction.)

code:
  v: CodeSystem.purpose
display:
  v: purpose
target:
  code:
    v: CodeSystem.purpose
  display:
    v: CodeSystem.purpose
  equivalence:
    v: equivalent
  comment:
    v: Element `CodeSystem.purpose` is mapped to FHIR R4 element `CodeSystem.purpose` as `Equivalent`. This element does not describe the usage of the code system. Instead, it provides traceability of ''why'' the resource is either needed or ''why'' it is defined as it is. This may be used to point to source materials or specifications that drove the structure of this code system.

code:
  v: CodeSystem.copyright
display:
  v: copyright
target:
  code:
    v: CodeSystem.copyright
  display:
    v: CodeSystem.copyright
  equivalence:
    v: equivalent
  comment:
    v: Element `CodeSystem.copyright` is mapped to FHIR R4 element `CodeSystem.copyright` as `Equivalent`. ... Sometimes, the copyright differs between the code system and the codes that are included. The copyright statement should clearly differentiate between these when required.

code:
  v: CodeSystem.caseSensitive
display:
  v: caseSensitive
target:
  code:
    v: CodeSystem.caseSensitive
  display:
    v: CodeSystem.caseSensitive
  equivalence:
    v: equivalent
  comment:
    v: Element `CodeSystem.caseSensitive` is mapped to FHIR R4 element `CodeSystem.caseSensitive` as `Equivalent`. If this value is missing, then it is not specified whether a code system is case sensitive or not. When the rule is not known, Postel's law should be followed: produce codes with the correct case, and accept codes in any case. This element is primarily provided to support validation software.

code:
  v: CodeSystem.valueSet
display:
  v: valueSet
target:
  code:
    v: CodeSystem.valueSet
  display:
    v: CodeSystem.valueSet
  equivalence:
    v: equivalent
  comment:
    v: Element `CodeSystem.valueSet` is mapped to FHIR R4 element `CodeSystem.valueSet` as `Equivalent`. The definition of the value set SHALL include all codes from this code system, independent of concept status, and only codes from this code system. It SHALL be immutable, and operations SHOULD support validation of any allowed code compositions.

code:
  v: CodeSystem.hierarchyMeaning
display:
  v: hierarchyMeaning
target:
  code:
    v: CodeSystem.hierarchyMeaning
  display:
    v: CodeSystem.hierarchyMeaning
  equivalence:
    v: equivalent
  comment:
    v: Element `CodeSystem.hierarchyMeaning` is mapped to FHIR R4 element `CodeSystem.hierarchyMeaning` as `Equivalent`. Note that other representations might have a different hierarchy or none at all, and represent the information using properties.

code:
  v: CodeSystem.compositional
display:
  v: compositional
target:
  code:
    v: CodeSystem.compositional
  display:
    v: CodeSystem.compositional
  equivalence:
    v: equivalent
  comment:
    v: Element `CodeSystem.compositional` is mapped to FHIR R4 element `CodeSystem.compositional` as `Equivalent`. Note that the code system resource does not define what the compositional grammar is, only whether or not there is one.

code:
  v: CodeSystem.versionNeeded
display:
  v: versionNeeded
target:
  code:
    v: CodeSystem.versionNeeded
  display:
    v: CodeSystem.versionNeeded
  equivalence:
    v: equivalent
  comment:
    v: Element `CodeSystem.versionNeeded` is mapped to FHIR R4 element `CodeSystem.versionNeeded` as `Equivalent`. Best practice is that code systems do not redefine concepts, or that if concepts are redefined, a new code system definition is created. But this is not always possible, so some code systems may be defined as 'versionNeeded'. Most code systems occasionally refine the displays defined for concepts between versions. Contexts in which the concept display values are validated may require that the version be specified for some code systems irrespective of the value of this property.

code:
  v: CodeSystem.content
display:
  v: content
target:
  code:
    v: CodeSystem.content
  display:
    v: CodeSystem.content
  equivalence:
    v: equivalent
  comment:
    v: Element `CodeSystem.content` is mapped to FHIR R4 element `CodeSystem.content` as `Equivalent`.

code:
  v: CodeSystem.supplements
display:
  v: supplements
target:
  code:
    v: CodeSystem.supplements
  display:
    v: CodeSystem.supplements
  equivalence:
    v: equivalent
  comment:
    v: Element `CodeSystem.supplements` is mapped to FHIR R4 element `CodeSystem.supplements` as `Equivalent`. The most common use of a code system supplement is to add additional language support.

code:
  v: CodeSystem.count
display:
  v: count
target:
  code:
    v: CodeSystem.count
  display:
    v: CodeSystem.count
  equivalence:
    v: equivalent
  comment:
    v: Element `CodeSystem.count` is mapped to FHIR R4 element `CodeSystem.count` as `Equivalent`. The count of concepts defined in this resource cannot be more than this value but may be less for several reasons - see the content element.

code:
  v: CodeSystem.filter
display:
  v: filter
target:
  code:
    v: CodeSystem.filter
  display:
    v: CodeSystem.filter
  equivalence:
    v: wider
  comment:
    v: Element `CodeSystem.filter` is mapped to FHIR R4 element `CodeSystem.filter` as `Equivalent`. Note that filters defined in code systems usually require custom code on the part of any terminology engine that will make them available for use in value set filters. For this reason, they are generally only seen in high value published terminologies.

code:
  v: CodeSystem.filter.code
display:
  v: code
target:
  code:
    v: CodeSystem.filter.code
  display:
    v: CodeSystem.filter.code
  equivalence:
    v: equivalent
  comment:
    v: Element `CodeSystem.filter.code` is mapped to FHIR R4 element `CodeSystem.filter.code` as `Equivalent`.

code:
  v: CodeSystem.filter.description
display:
  v: description
target:
  code:
    v: CodeSystem.filter.description
  display:
    v: CodeSystem.filter.description
  equivalence:
    v: equivalent
  comment:
    v: Element `CodeSystem.filter.description` is mapped to FHIR R4 element `CodeSystem.filter.description` as `Equivalent`.

code:
  v: CodeSystem.filter.operator
display:
  v: operator
target:
  code:
    v: CodeSystem.filter.operator
  display:
    v: CodeSystem.filter.operator
  equivalence:
    v: wider
  comment:
    v: Element `CodeSystem.filter.operator` is mapped to FHIR R4 element `CodeSystem.filter.operator` as `SourceIsBroaderThanTarget`.

code:
  v: CodeSystem.filter.value
display:
  v: value
target:
  code:
    v: CodeSystem.filter.value
  display:
    v: CodeSystem.filter.value
  equivalence:
    v: equivalent
  comment:
    v: Element `CodeSystem.filter.value` is mapped to FHIR R4 element `CodeSystem.filter.value` as `Equivalent`.

code:
  v: CodeSystem.property
display:
  v: property
target:
  code:
    v: CodeSystem.property
  display:
    v: CodeSystem.property
  equivalence:
    v: wider
  comment:
    v: Element `CodeSystem.property` is mapped to FHIR R4 element `CodeSystem.property` as `Equivalent`. Multiple occurrences of CodeSystem.concept.property may occur for a CodeSystem.property where CodeSystem.concept.property.code is the same and CodeSystem.concept.property.value differs. For example: multiple designations for a single concept.

code:
  v: CodeSystem.property.code
display:
  v: code
target:
  code:
    v: CodeSystem.property.code
  display:
    v: CodeSystem.property.code
  equivalence:
    v: equivalent
  comment:
    v: Element `CodeSystem.property.code` is mapped to FHIR R4 element `CodeSystem.property.code` as `Equivalent`.

code:
  v: CodeSystem.property.uri
display:
  v: uri
target:
  code:
    v: CodeSystem.property.uri
  display:
    v: CodeSystem.property.uri
  equivalence:
    v: equivalent
  comment:
    v: Element `CodeSystem.property.uri` is mapped to FHIR R4 element `CodeSystem.property.uri` as `Equivalent`.

code:
  v: CodeSystem.property.description
display:
  v: description
target:
  code:
    v: CodeSystem.property.description
  display:
    v: CodeSystem.property.description
  equivalence:
    v: equivalent
  comment:
    v: Element `CodeSystem.property.description` is mapped to FHIR R4 element `CodeSystem.property.description` as `Equivalent`.

code:
  v: CodeSystem.property.type
display:
  v: type
target:
  code:
    v: CodeSystem.property.type
  display:
    v: CodeSystem.property.type
  equivalence:
    v: equivalent
  comment:
    v: Element `CodeSystem.property.type` is mapped to FHIR R4 element `CodeSystem.property.type` as `Equivalent`.

code:
  v: CodeSystem.concept
display:
  v: concept
target:
  code:
    v: CodeSystem.concept
  display:
    v: CodeSystem.concept
  equivalence:
    v: wider
  comment:
    v: Element `CodeSystem.concept` is mapped to FHIR R4 element `CodeSystem.concept` as `Equivalent`. If this is empty, it means that the code system resource does not represent the content of the code system.

code:
  v: CodeSystem.concept.code
display:
  v: code
target:
  code:
    v: CodeSystem.concept.code
  display:
    v: CodeSystem.concept.code
  equivalence:
    v: equivalent
  comment:
    v: Element `CodeSystem.concept.code` is mapped to FHIR R4 element `CodeSystem.concept.code` as `Equivalent`.

code:
  v: CodeSystem.concept.display
display:
  v: display
target:
  code:
    v: CodeSystem.concept.display
  display:
    v: CodeSystem.concept.display
  equivalence:
    v: equivalent
  comment:
    v: Element `CodeSystem.concept.display` is mapped to FHIR R4 element `CodeSystem.concept.display` as `Equivalent`.

code:
  v: CodeSystem.concept.definition
display:
  v: definition
target:
  code:
    v: CodeSystem.concept.definition
  display:
    v: CodeSystem.concept.definition
  equivalence:
    v: equivalent
  comment:
    v: Element `CodeSystem.concept.definition` is mapped to FHIR R4 element `CodeSystem.concept.definition` as `Equivalent`.

code:
  v: CodeSystem.concept.designation
display:
  v: designation
target:
  code:
    v: CodeSystem.concept.designation
  display:
    v: CodeSystem.concept.designation
  equivalence:
    v: wider
  comment:
    v: Element `CodeSystem.concept.designation` is mapped to FHIR R4 element `CodeSystem.concept.designation` as `Equivalent`. Concepts have both a ```display``` and an array of ```designation```. The display is equivalent to a special designation with an implied ```designation.use``` of "primary code" and a language equal to the [Resource Language](https://hl7.org/fhir/resource..html#language).

code:
  v: CodeSystem.concept.designation.language
display:
  v: language
target:
  code:
    v: CodeSystem.concept.designation.language
  display:
    v: CodeSystem.concept.designation.language
  equivalence:
    v: equivalent
  comment:
    v: Element `CodeSystem.concept.designation.language` is mapped to FHIR R4 element `CodeSystem.concept.designation.language` as `Equivalent`. In the absence of a language, the resource language applies.

code:
  v: CodeSystem.concept.designation.use
display:
  v: use
target:
  code:
    v: CodeSystem.concept.designation.use
  display:
    v: CodeSystem.concept.designation.use
  equivalence:
    v: equivalent
  comment:
    v: Element `CodeSystem.concept.designation.use` is mapped to FHIR R4 element `CodeSystem.concept.designation.use` as `Equivalent`. If no use is provided, the designation can be assumed to be suitable for general display to a human user.

code:
  v: CodeSystem.concept.designation.value
display:
  v: value
target:
  code:
    v: CodeSystem.concept.designation.value
  display:
    v: CodeSystem.concept.designation.value
  equivalence:
    v: equivalent
  comment:
    v: Element `CodeSystem.concept.designation.value` is mapped to FHIR R4 element `CodeSystem.concept.designation.value` as `Equivalent`.

code:
  v: CodeSystem.concept.property
display:
  v: property
target:
  code:
    v: CodeSystem.concept.property
  display:
    v: CodeSystem.concept.property
  equivalence:
    v: wider
  comment:
    v: Element `CodeSystem.concept.property` is mapped to FHIR R4 element `CodeSystem.concept.property` as `Equivalent`.

code:
  v: CodeSystem.concept.property.code
display:
  v: code
target:
  code:
    v: CodeSystem.concept.property.code
  display:
    v: CodeSystem.concept.property.code
  equivalence:
    v: equivalent
  comment:
    v: Element `CodeSystem.concept.property.code` is mapped to FHIR R4 element `CodeSystem.concept.property.code` as `Equivalent`.

code:
  v: CodeSystem.concept.property.value[x]
display:
  v: value[x]
target:
  code:
    v: CodeSystem.concept.property.value[x]
  display:
    v: CodeSystem.concept.property.value[x]
  equivalence:
    v: equivalent
  comment:
    v: Element `CodeSystem.concept.property.value[x]` is mapped to FHIR R4 element `CodeSystem.concept.property.value[x]` as `Equivalent`. The target context `CodeSystem.concept.property.value[x]` is a choice-type element and cannot directly hold extensions. The context is moved up to parent element `CodeSystem.concept.property`.

code:
  v: CodeSystem.concept.concept
display:
  v: concept
target:
  code:
    v: CodeSystem.concept.concept
  display:
    v: CodeSystem.concept.concept
  equivalence:
    v: equivalent
  comment:
    v: Element `CodeSystem.concept.concept` is mapped to FHIR R4 element `CodeSystem.concept.concept` as `Equivalent`.

source:
  v: http://hl7.org/fhir/StructureDefinition/CodeSystem
  l: CodeSystem
source version:
  v: 5.0.0
target:
  v: http://hl7.org/fhir/5.0/StructureDefinition/extension-CodeSystem.filter.operator
  l: extension-CodeSystem.filter.operator
target version:
  v: 0.1.0
element:
  code:
    v: CodeSystem.filter.operator
  display:
    v: operator
  target:
    code:
      v: Extension
    equivalence:
      v: equivalent
    comment:
      v: Element `CodeSystem.filter.operator` is mapped to FHIR R4 element `CodeSystem.filter.operator` as `SourceIsBroaderThanTarget`.

source:
  v: http://hl7.org/fhir/StructureDefinition/CodeSystem
  l: CodeSystem
source version:
  v: 5.0.0
target:
  v: http://hl7.org/fhir/5.0/StructureDefinition/extension-CodeSystem.concept.designation.additionalUse
  l: extension-CodeSystem.concept.designation.additionalUse
target version:
  v: 0.1.0
element:
  code:
    v: CodeSystem.concept.designation.additionalUse
  display:
    v: additionalUse
  target:
    code:
      v: Extension
    equivalence:
      v: wider
    comment:
      v: Element `CodeSystem.concept.designation.additionalUse` has a context of CodeSystem.concept.designation based on following the parent source element upwards and mapping to `CodeSystem`. Element `CodeSystem.concept.designation.additionalUse` has no mapping targets in FHIR R4. Typically, this is because the element has been added (is a new element). This was added rather than increasing the cardinality of .use to 0..* in order to maintain backward compatibility.