FHIR © HL7.org  |  FHIRsmith 4.0.1  |  Server Home  |  XIG Home  |  XIG Stats  | 

FHIR IG analytics

Packagehl7.fhir.uv.xver-r2.r5
Resource TypeConceptMap
IdConceptMap-R2-Subscription-element-map-to-R5.json
FHIR VersionR5
Sourcehttp://hl7.org/fhir/uv/xver-r2.r5/0.1.0/ConceptMap-R2-Subscription-element-map-to-R5.html
URLhttp://hl7.org/fhir/uv/xver/ConceptMap/R2-Subscription-element-map-to-R5
Version0.1.0
Statusactive
Date2026-03-17T16:05:26.4300454-05:00
NameR2SubscriptionElementMapToR5
TitleCross-version mapping for FHIR DSTU2 Subscription to FHIR R5 Subscription
Realmuv
Authorityhl7
DescriptionThis ConceptMap represents cross-version mappings for elements from a FHIR DSTU2 Subscription to FHIR R5.

Resources that use this resource

No resources found


Resources that this resource uses

StructureDefinition
hl7.fhir.uv.xver-r2.r5#0.1.0extension-Subscription.channelDSTU2: The channel on which to report matches to the criteria (new)
hl7.fhir.uv.xver-r2.r4b#0.1.0extension-Subscription.contactDSTU2: contact additional types
hl7.fhir.uv.xver-r2.r5#0.1.0extension-Subscription.criteriaDSTU2: Rule for server push criteria (new)
hl7.fhir.uv.xver-r2.r5#0.1.0extension-Subscription.errorDSTU2: Latest error note (new)
hl7.fhir.uv.xver-r2.r4b#0.1.0extension-Subscription.metaDSTU2: meta additional types
hl7.fhir.uv.xver-r2.r4b#0.1.0extension-Subscription.tagDSTU2: A tag to add to matching resources (new)
hl7.fhir.uv.xver-r2.r4b#0.1.0extension-Subscription.textDSTU2: text additional types

Narrative

Note: links and images are rebased to the (stated) source

Generated Narrative: ConceptMap R2-Subscription-element-map-to-R5

Mapping from http://hl7.org/fhir/1.0 to http://hl7.org/fhir/5.0


Group 1 Mapping from http://hl7.org/fhir/StructureDefinition/Subscription|1.0.2 to Subscriptionversion: 5.0.0)

Source CodeRelationshipTarget CodeComment
Subscription.meta (meta)is broader thanSubscription.metaElement `Subscription.meta` is mapped to FHIR R5 element `Subscription.meta` as `SourceIsBroaderThanTarget`. The mappings for `Subscription.meta` do not cover the following types: Meta. The mappings for `Subscription.meta` do not cover the following types based on type expansion: lastUpdated, profile, security, tag, versionId.
Subscription.implicitRules (implicitRules)is equivalent toSubscription.implicitRulesElement `Subscription.implicitRules` is mapped to FHIR R5 element `Subscription.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 as much as possible.
Subscription.language (language)is equivalent toSubscription.languageElement `Subscription.language` is mapped to FHIR R5 element `Subscription.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).
Subscription.text (text)is broader thanSubscription.textElement `Subscription.text` is mapped to FHIR R5 element `Subscription.text` as `SourceIsBroaderThanTarget`. The mappings for `Subscription.text` do not cover the following types: Narrative. The mappings for `Subscription.text` do not cover the following types based on type expansion: div, status. Contained resources do not have narrative. Resources that are not contained SHOULD have a narrative.
Subscription.contained (contained)is equivalent toSubscription.containedElement `Subscription.contained` is mapped to FHIR R5 element `Subscription.contained` as `SourceIsBroaderThanTarget`. 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.
Subscription.contact (contact)is broader thanSubscription.contactElement `Subscription.contact` is mapped to FHIR R5 element `Subscription.contact` as `SourceIsBroaderThanTarget`. The mappings for `Subscription.contact` do not cover the following types: ContactPoint. The mappings for `Subscription.contact` do not cover the following types based on type expansion: period, rank, system, use, value.
Subscription.reason (reason)is equivalent toSubscription.reasonElement `Subscription.reason` is mapped to FHIR R5 element `Subscription.reason` as `Equivalent`.
Subscription.status (status)is equivalent toSubscription.statusElement `Subscription.status` is mapped to FHIR R5 element `Subscription.status` as `SourceIsNarrowerThanTarget`. The mappings for `Subscription.status` do not allow expression of the necessary codes, per the bindings on the source and target. A client can only submit subscription resources in the requested or off state. Only the server can move a subscription from requested to active, and then to error. Either the server or the client can turn a subscription off.
Subscription.end (end)is equivalent toSubscription.endElement `Subscription.end` is mapped to FHIR R5 element `Subscription.end` as `Equivalent`. The server is permitted to deviate from this time, but should observe it.

Group 2 Mapping from http://hl7.org/fhir/StructureDefinition/Subscription|1.0.2 to DSTU2: meta additional typesversion: 0.1.0)

Source CodeRelationshipTarget CodeComment
Subscription.meta (meta)is equivalent toExtension (DSTU2: meta additional types)Element `Subscription.meta` is mapped to FHIR R5 element `Subscription.meta` as `SourceIsBroaderThanTarget`. The mappings for `Subscription.meta` do not cover the following types: Meta. The mappings for `Subscription.meta` do not cover the following types based on type expansion: lastUpdated, profile, security, tag, versionId.

Group 3 Mapping from http://hl7.org/fhir/StructureDefinition/Subscription|1.0.2 to DSTU2: text additional typesversion: 0.1.0)

Source CodeRelationshipTarget CodeComment
Subscription.text (text)is equivalent toExtension (DSTU2: text additional types)Element `Subscription.text` is mapped to FHIR R5 element `Subscription.text` as `SourceIsBroaderThanTarget`. The mappings for `Subscription.text` do not cover the following types: Narrative. The mappings for `Subscription.text` do not cover the following types based on type expansion: div, status. Contained resources do not have narrative. Resources that are not contained SHOULD have a narrative.

Group 4 Mapping from http://hl7.org/fhir/StructureDefinition/Subscription|1.0.2 to DSTU2: Rule for server push criteria (new)version: 0.1.0)

Source CodeRelationshipTarget CodeComment
Subscription.criteria (criteria)is equivalent toExtension (DSTU2: Rule for server push criteria (new))Element `Subscription.criteria` has a context of Subscription based on following the parent source element upwards and mapping to `Subscription`. Element `Subscription.criteria` has no mapping targets in FHIR R5. Typically, this is because the element has been added (is a new element). The rules are a search criteria (without the [base] part). Like Bundle.entry.request.url, it has no leading "/".

Group 5 Mapping from http://hl7.org/fhir/StructureDefinition/Subscription|1.0.2 to DSTU2: contact additional typesversion: 0.1.0)

Source CodeRelationshipTarget CodeComment
Subscription.contact (contact)is equivalent toExtension (DSTU2: contact additional types)Element `Subscription.contact` is mapped to FHIR R5 element `Subscription.contact` as `SourceIsBroaderThanTarget`. The mappings for `Subscription.contact` do not cover the following types: ContactPoint. The mappings for `Subscription.contact` do not cover the following types based on type expansion: period, rank, system, use, value.

Group 6 Mapping from http://hl7.org/fhir/StructureDefinition/Subscription|1.0.2 to DSTU2: Latest error note (new)version: 0.1.0)

Source CodeRelationshipTarget CodeComment
Subscription.error (error)is equivalent toExtension (DSTU2: Latest error note (new))Element `Subscription.error` has a context of Subscription based on following the parent source element upwards and mapping to `Subscription`. Element `Subscription.error` has no mapping targets in FHIR R5. Typically, this is because the element has been added (is a new element).

Group 7 Mapping from http://hl7.org/fhir/StructureDefinition/Subscription|1.0.2 to DSTU2: The channel on which to report matches to the criteria (new)version: 0.1.0)

Source CodeRelationshipTarget CodeComment
Subscription.channel (channel)is equivalent toExtension (DSTU2: The channel on which to report matches to the criteria (new))Element `Subscription.channel` has a context of Subscription based on following the parent source element upwards and mapping to `Subscription`. Element `Subscription.channel` has no mapping targets in FHIR R5. Typically, this is because the element has been added (is a new element).
Subscription.channel.type (type)is equivalent toExtension.extension:type (DSTU2: rest-hook | websocket | email | sms | message (new))Element `Subscription.channel.type` is part of an existing definition because parent element `Subscription.channel` requires a cross-version extension. Element `Subscription.channel.type` has a context of Subscription based on following the parent source element upwards and mapping to `Subscription`. Element `Subscription.channel.type` has no mapping targets in FHIR R5. Typically, this is because the element has been added (is a new element).
Subscription.channel.endpoint (endpoint)is equivalent toExtension.extension:endpoint (DSTU2: Where the channel points to (new))Element `Subscription.channel.endpoint` is part of an existing definition because parent element `Subscription.channel` requires a cross-version extension. Element `Subscription.channel.endpoint` has a context of Subscription based on following the parent source element upwards and mapping to `Subscription`. Element `Subscription.channel.endpoint` has no mapping targets in FHIR R5. Typically, this is because the element has been added (is a new element). For rest-hook, and websocket, the end-point must be an http: or https: URL; for email, a mailto: url, for sms, a tel: url, and for message the endpoint can be in any form of url the server understands (usually, http: or mllp:). The URI is allowed to be relative; in which case, it is relative to the server end-point (since their may be more than one, clients should avoid using relative URIs).
Subscription.channel.payload (payload)is equivalent toExtension.extension:payload (DSTU2: Mimetype to send, or blank for no payload (new))Element `Subscription.channel.payload` is part of an existing definition because parent element `Subscription.channel` requires a cross-version extension. Element `Subscription.channel.payload` has a context of Subscription based on following the parent source element upwards and mapping to `Subscription`. Element `Subscription.channel.payload` has no mapping targets in FHIR R5. Typically, this is because the element has been added (is a new element). Sending the payload has obvious security consequences. The server is responsible for ensuring that the content is appropriately secured.
Subscription.channel.header (header)is broader thanExtension.extension:header (DSTU2: Usage depends on the channel type (new))Element `Subscription.channel.header` is part of an existing definition because parent element `Subscription.channel` requires a cross-version extension. Element `Subscription.channel.header` has a context of Subscription based on following the parent source element upwards and mapping to `Subscription`. Element `Subscription.channel.header` has no mapping targets in FHIR R5. Typically, this is because the element has been added (is a new element). Exactly what these mean depend on the channel type. The can convey additional information to the recipient and/or meet security requirements.

Group 8 Mapping from http://hl7.org/fhir/StructureDefinition/Subscription|1.0.2 to DSTU2: A tag to add to matching resources (new)version: 0.1.0)

Source CodeRelationshipTarget CodeComment
Subscription.tag (tag)is equivalent toExtension (DSTU2: A tag to add to matching resources (new))Element `Subscription.tag` has a context of Subscription based on following the parent source element upwards and mapping to `Subscription`. Element `Subscription.tag` has no mapping targets in FHIR R5. Typically, this is because the element has been added (is a new element). So that other systems can tell which resources have been the subject of a notification.

Source1

{
  "resourceType": "ConceptMap",
  "id": "R2-Subscription-element-map-to-R5",
  "text": {
    "status": "generated",
    "div": "<!-- snip (see above) -->"
  },
  "extension": [
    {
      "url": "http://hl7.org/fhir/StructureDefinition/structuredefinition-wg",
      "valueCode": "fhir"
    },
    {
      "url": "http://hl7.org/fhir/StructureDefinition/structuredefinition-fmm",
      "valueInteger": 0,
      "_valueInteger": {
        "extension": [
          {
            "url": "http://hl7.org/fhir/StructureDefinition/structuredefinition-conformance-derivedFrom",
            "valueCanonical": "http://hl7.org/fhir/uv/xver/ImplementationGuide/hl7.fhir.uv.xver-r2.r5"
          }
        ]
      }
    },
    {
      "url": "http://hl7.org/fhir/StructureDefinition/structuredefinition-standards-status",
      "valueCode": "trial-use",
      "_valueCode": {
        "extension": [
          {
            "url": "http://hl7.org/fhir/StructureDefinition/structuredefinition-conformance-derivedFrom",
            "valueCanonical": "http://hl7.org/fhir/uv/xver/ImplementationGuide/hl7.fhir.uv.xver-r2.r5"
          }
        ]
      }
    }
  ],
  "url": "http://hl7.org/fhir/uv/xver/ConceptMap/R2-Subscription-element-map-to-R5",
  "version": "0.1.0",
  "name": "R2SubscriptionElementMapToR5",
  "title": "Cross-version mapping for FHIR DSTU2 Subscription to FHIR R5 Subscription",
  "status": "active",
  "experimental": false,
  "date": "2026-03-17T16:05:26.4300454-05:00",
  "contact": [
    {
      "name": "FHIR Infrastructure",
      "telecom": [
        {
          "system": "url",
          "value": "http://www.hl7.org/Special/committees/fiwg"
        }
      ]
    }
  ],
  "description": "This ConceptMap represents cross-version mappings for elements from a FHIR DSTU2 Subscription to FHIR R5.",
  "jurisdiction": [
    {
      "coding": [
        {
          "system": "http://unstats.un.org/unsd/methods/m49/m49.htm",
          "code": "001",
          "display": "World"
        }
      ]
    }
  ],
  "sourceScopeCanonical": "http://hl7.org/fhir/1.0",
  "targetScopeUri": "http://hl7.org/fhir/5.0",
  "group": [
    {
      "source": "http://hl7.org/fhir/StructureDefinition/Subscription|1.0.2",
      "target": "http://hl7.org/fhir/StructureDefinition/Subscription|5.0.0",
      "element": [
        {
          "code": "Subscription.meta",
          "display": "meta",
          "target": [
            {
              "code": "Subscription.meta",
              "display": "Subscription.meta",
              "relationship": "source-is-broader-than-target",
              "comment": "Element `Subscription.meta` is mapped to FHIR R5 element `Subscription.meta` as `SourceIsBroaderThanTarget`.\nThe mappings for `Subscription.meta` do not cover the following types: Meta.\nThe mappings for `Subscription.meta` do not cover the following types based on type expansion: lastUpdated, profile, security, tag, versionId."
            }
          ]
        },
        {
          "code": "Subscription.implicitRules",
          "display": "implicitRules",
          "target": [
            {
              "code": "Subscription.implicitRules",
              "display": "Subscription.implicitRules",
              "relationship": "equivalent",
              "comment": "Element `Subscription.implicitRules` is mapped to FHIR R5 element `Subscription.implicitRules` as `Equivalent`.\nAsserting 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 as much as possible."
            }
          ]
        },
        {
          "code": "Subscription.language",
          "display": "language",
          "target": [
            {
              "code": "Subscription.language",
              "display": "Subscription.language",
              "relationship": "equivalent",
              "comment": "Element `Subscription.language` is mapped to FHIR R5 element `Subscription.language` as `Equivalent`.\nLanguage 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)."
            }
          ]
        },
        {
          "code": "Subscription.text",
          "display": "text",
          "target": [
            {
              "code": "Subscription.text",
              "display": "Subscription.text",
              "relationship": "source-is-broader-than-target",
              "comment": "Element `Subscription.text` is mapped to FHIR R5 element `Subscription.text` as `SourceIsBroaderThanTarget`.\nThe mappings for `Subscription.text` do not cover the following types: Narrative.\nThe mappings for `Subscription.text` do not cover the following types based on type expansion: div, status.\nContained resources do not have narrative. Resources that are not contained SHOULD have a narrative."
            }
          ]
        },
        {
          "code": "Subscription.contained",
          "display": "contained",
          "target": [
            {
              "code": "Subscription.contained",
              "display": "Subscription.contained",
              "relationship": "equivalent",
              "comment": "Element `Subscription.contained` is mapped to FHIR R5 element `Subscription.contained` as `SourceIsBroaderThanTarget`.\nThis 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."
            }
          ]
        },
        {
          "code": "Subscription.contact",
          "display": "contact",
          "target": [
            {
              "code": "Subscription.contact",
              "display": "Subscription.contact",
              "relationship": "source-is-broader-than-target",
              "comment": "Element `Subscription.contact` is mapped to FHIR R5 element `Subscription.contact` as `SourceIsBroaderThanTarget`.\nThe mappings for `Subscription.contact` do not cover the following types: ContactPoint.\nThe mappings for `Subscription.contact` do not cover the following types based on type expansion: period, rank, system, use, value."
            }
          ]
        },
        {
          "code": "Subscription.reason",
          "display": "reason",
          "target": [
            {
              "code": "Subscription.reason",
              "display": "Subscription.reason",
              "relationship": "equivalent",
              "comment": "Element `Subscription.reason` is mapped to FHIR R5 element `Subscription.reason` as `Equivalent`."
            }
          ]
        },
        {
          "code": "Subscription.status",
          "display": "status",
          "target": [
            {
              "code": "Subscription.status",
              "display": "Subscription.status",
              "relationship": "equivalent",
              "comment": "Element `Subscription.status` is mapped to FHIR R5 element `Subscription.status` as `SourceIsNarrowerThanTarget`.\nThe mappings for `Subscription.status` do not allow expression of the necessary codes, per the bindings on the source and target.\nA client can only submit subscription resources in the requested or off state. Only the server can  move a subscription from requested to active, and then to error. Either the server or the client can turn a subscription off."
            }
          ]
        },
        {
          "code": "Subscription.end",
          "display": "end",
          "target": [
            {
              "code": "Subscription.end",
              "display": "Subscription.end",
              "relationship": "equivalent",
              "comment": "Element `Subscription.end` is mapped to FHIR R5 element `Subscription.end` as `Equivalent`.\nThe server is permitted to deviate from this time, but should observe it."
            }
          ]
        }
      ]
    },
    {
      "source": "http://hl7.org/fhir/StructureDefinition/Subscription|1.0.2",
      "target": "http://hl7.org/fhir/1.0/StructureDefinition/extension-Subscription.meta|0.1.0",
      "element": [
        {
          "code": "Subscription.meta",
          "display": "meta",
          "target": [
            {
              "code": "Extension",
              "relationship": "equivalent",
              "comment": "Element `Subscription.meta` is mapped to FHIR R5 element `Subscription.meta` as `SourceIsBroaderThanTarget`.\nThe mappings for `Subscription.meta` do not cover the following types: Meta.\nThe mappings for `Subscription.meta` do not cover the following types based on type expansion: lastUpdated, profile, security, tag, versionId."
            }
          ]
        }
      ]
    },
    {
      "source": "http://hl7.org/fhir/StructureDefinition/Subscription|1.0.2",
      "target": "http://hl7.org/fhir/1.0/StructureDefinition/extension-Subscription.text|0.1.0",
      "element": [
        {
          "code": "Subscription.text",
          "display": "text",
          "target": [
            {
              "code": "Extension",
              "relationship": "equivalent",
              "comment": "Element `Subscription.text` is mapped to FHIR R5 element `Subscription.text` as `SourceIsBroaderThanTarget`.\nThe mappings for `Subscription.text` do not cover the following types: Narrative.\nThe mappings for `Subscription.text` do not cover the following types based on type expansion: div, status.\nContained resources do not have narrative. Resources that are not contained SHOULD have a narrative."
            }
          ]
        }
      ]
    },
    {
      "source": "http://hl7.org/fhir/StructureDefinition/Subscription|1.0.2",
      "target": "http://hl7.org/fhir/1.0/StructureDefinition/extension-Subscription.criteria|0.1.0",
      "element": [
        {
          "code": "Subscription.criteria",
          "display": "criteria",
          "target": [
            {
              "code": "Extension",
              "relationship": "equivalent",
              "comment": "Element `Subscription.criteria` has a context of Subscription based on following the parent source element upwards and mapping to `Subscription`.\nElement `Subscription.criteria` has no mapping targets in FHIR R5. Typically, this is because the element has been added (is a new element).\nThe rules are a search criteria (without the [base] part). Like Bundle.entry.request.url, it has no leading \"/\"."
            }
          ]
        }
      ]
    },
    {
      "source": "http://hl7.org/fhir/StructureDefinition/Subscription|1.0.2",
      "target": "http://hl7.org/fhir/1.0/StructureDefinition/extension-Subscription.contact|0.1.0",
      "element": [
        {
          "code": "Subscription.contact",
          "display": "contact",
          "target": [
            {
              "code": "Extension",
              "relationship": "equivalent",
              "comment": "Element `Subscription.contact` is mapped to FHIR R5 element `Subscription.contact` as `SourceIsBroaderThanTarget`.\nThe mappings for `Subscription.contact` do not cover the following types: ContactPoint.\nThe mappings for `Subscription.contact` do not cover the following types based on type expansion: period, rank, system, use, value."
            }
          ]
        }
      ]
    },
    {
      "source": "http://hl7.org/fhir/StructureDefinition/Subscription|1.0.2",
      "target": "http://hl7.org/fhir/1.0/StructureDefinition/extension-Subscription.error|0.1.0",
      "element": [
        {
          "code": "Subscription.error",
          "display": "error",
          "target": [
            {
              "code": "Extension",
              "relationship": "equivalent",
              "comment": "Element `Subscription.error` has a context of Subscription based on following the parent source element upwards and mapping to `Subscription`.\nElement `Subscription.error` has no mapping targets in FHIR R5. Typically, this is because the element has been added (is a new element)."
            }
          ]
        }
      ]
    },
    {
      "source": "http://hl7.org/fhir/StructureDefinition/Subscription|1.0.2",
      "target": "http://hl7.org/fhir/1.0/StructureDefinition/extension-Subscription.channel|0.1.0",
      "element": [
        {
          "code": "Subscription.channel",
          "display": "channel",
          "target": [
            {
              "code": "Extension",
              "relationship": "equivalent",
              "comment": "Element `Subscription.channel` has a context of Subscription based on following the parent source element upwards and mapping to `Subscription`.\nElement `Subscription.channel` has no mapping targets in FHIR R5. Typically, this is because the element has been added (is a new element)."
            }
          ]
        },
        {
          "code": "Subscription.channel.type",
          "display": "type",
          "target": [
            {
              "code": "Extension.extension:type",
              "relationship": "equivalent",
              "comment": "Element `Subscription.channel.type` is part of an existing definition because parent element `Subscription.channel` requires a cross-version extension.\nElement `Subscription.channel.type` has a context of Subscription based on following the parent source element upwards and mapping to `Subscription`.\nElement `Subscription.channel.type` has no mapping targets in FHIR R5. Typically, this is because the element has been added (is a new element)."
            }
          ]
        },
        {
          "code": "Subscription.channel.endpoint",
          "display": "endpoint",
          "target": [
            {
              "code": "Extension.extension:endpoint",
              "relationship": "equivalent",
              "comment": "Element `Subscription.channel.endpoint` is part of an existing definition because parent element `Subscription.channel` requires a cross-version extension.\nElement `Subscription.channel.endpoint` has a context of Subscription based on following the parent source element upwards and mapping to `Subscription`.\nElement `Subscription.channel.endpoint` has no mapping targets in FHIR R5. Typically, this is because the element has been added (is a new element).\nFor rest-hook, and websocket, the end-point must be an http: or https: URL; for email, a mailto: url, for sms, a tel: url, and for message the endpoint can be in any form of url the server understands (usually, http: or mllp:). The URI is allowed to be relative; in which case, it is relative to the server end-point (since their may be more than one, clients should avoid using relative URIs)."
            }
          ]
        },
        {
          "code": "Subscription.channel.payload",
          "display": "payload",
          "target": [
            {
              "code": "Extension.extension:payload",
              "relationship": "equivalent",
              "comment": "Element `Subscription.channel.payload` is part of an existing definition because parent element `Subscription.channel` requires a cross-version extension.\nElement `Subscription.channel.payload` has a context of Subscription based on following the parent source element upwards and mapping to `Subscription`.\nElement `Subscription.channel.payload` has no mapping targets in FHIR R5. Typically, this is because the element has been added (is a new element).\nSending the payload has obvious security consequences. The server is responsible for ensuring that the content is appropriately secured."
            }
          ]
        },
        {
          "code": "Subscription.channel.header",
          "display": "header",
          "target": [
            {
              "code": "Extension.extension:header",
              "relationship": "source-is-broader-than-target",
              "comment": "Element `Subscription.channel.header` is part of an existing definition because parent element `Subscription.channel` requires a cross-version extension.\nElement `Subscription.channel.header` has a context of Subscription based on following the parent source element upwards and mapping to `Subscription`.\nElement `Subscription.channel.header` has no mapping targets in FHIR R5. Typically, this is because the element has been added (is a new element).\nExactly what these mean depend on the channel type. The can convey additional information to the recipient and/or meet security requirements."
            }
          ]
        }
      ]
    },
    {
      "source": "http://hl7.org/fhir/StructureDefinition/Subscription|1.0.2",
      "target": "http://hl7.org/fhir/1.0/StructureDefinition/extension-Subscription.tag|0.1.0",
      "element": [
        {
          "code": "Subscription.tag",
          "display": "tag",
          "target": [
            {
              "code": "Extension",
              "relationship": "equivalent",
              "comment": "Element `Subscription.tag` has a context of Subscription based on following the parent source element upwards and mapping to `Subscription`.\nElement `Subscription.tag` has no mapping targets in FHIR R5. Typically, this is because the element has been added (is a new element).\nSo that other systems can tell which resources have been the subject of a notification."
            }
          ]
        }
      ]
    }
  ]
}