{
  "description": "The Subscription R5 Backport Implementation Guide enables servers running versions of FHIR earlier than R5 to implement a subset of R5 Subscriptions in a standardized way.",
  "_filename": "other/ig-r4.json",
  "package_name": "hl7.fhir.uv.subscriptions-backport.r4b",
  "definition": {
    "page": {
      "page": [ {
        "title": "Home",
        "nameUrl": "index.html",
        "extension": [ {
          "url": "http://hl7.org/fhir/tools/StructureDefinition/ig-page-name",
          "valueUrl": "index.html"
        } ],
        "generation": "markdown"
      }, {
        "page": [ {
          "title": "Actors",
          "nameUrl": "actors.html",
          "extension": [ {
            "url": "http://hl7.org/fhir/tools/StructureDefinition/ig-page-name",
            "valueUrl": "actors.html"
          } ],
          "generation": "markdown"
        }, {
          "title": "Topic-Based Subscription Components",
          "nameUrl": "components.html",
          "extension": [ {
            "url": "http://hl7.org/fhir/tools/StructureDefinition/ig-page-name",
            "valueUrl": "components.html"
          } ],
          "generation": "markdown"
        }, {
          "title": "Workflow",
          "nameUrl": "workflow.html",
          "extension": [ {
            "url": "http://hl7.org/fhir/tools/StructureDefinition/ig-page-name",
            "valueUrl": "workflow.html"
          } ],
          "generation": "markdown"
        }, {
          "title": "Channels",
          "nameUrl": "channels.html",
          "extension": [ {
            "url": "http://hl7.org/fhir/tools/StructureDefinition/ig-page-name",
            "valueUrl": "channels.html"
          } ],
          "generation": "markdown"
        }, {
          "title": "Notifications",
          "nameUrl": "notifications.html",
          "extension": [ {
            "url": "http://hl7.org/fhir/tools/StructureDefinition/ig-page-name",
            "valueUrl": "notifications.html"
          } ],
          "generation": "markdown"
        }, {
          "title": "Payload Types",
          "nameUrl": "payloads.html",
          "extension": [ {
            "url": "http://hl7.org/fhir/tools/StructureDefinition/ig-page-name",
            "valueUrl": "payloads.html"
          } ],
          "generation": "markdown"
        }, {
          "title": "Conformance",
          "nameUrl": "conformance.html",
          "extension": [ {
            "url": "http://hl7.org/fhir/tools/StructureDefinition/ig-page-name",
            "valueUrl": "conformance.html"
          } ],
          "generation": "markdown"
        }, {
          "title": "Handling Errors",
          "nameUrl": "errors.html",
          "extension": [ {
            "url": "http://hl7.org/fhir/tools/StructureDefinition/ig-page-name",
            "valueUrl": "errors.html"
          } ],
          "generation": "markdown"
        } ],
        "title": "Specification",
        "nameUrl": "specification.html",
        "extension": [ {
          "url": "http://hl7.org/fhir/tools/StructureDefinition/ig-page-name",
          "valueUrl": "specification.html"
        } ],
        "generation": "markdown"
      }, {
        "title": "Safety and Security",
        "nameUrl": "safety_security.html",
        "extension": [ {
          "url": "http://hl7.org/fhir/tools/StructureDefinition/ig-page-name",
          "valueUrl": "safety_security.html"
        } ],
        "generation": "markdown"
      }, {
        "title": "Downloads",
        "nameUrl": "downloads.html",
        "extension": [ {
          "url": "http://hl7.org/fhir/tools/StructureDefinition/ig-page-name",
          "valueUrl": "downloads.html"
        } ],
        "generation": "markdown"
      } ],
      "title": "Table of Contents",
      "nameUrl": "toc.html",
      "extension": [ {
        "url": "http://hl7.org/fhir/tools/StructureDefinition/ig-page-name",
        "valueUrl": "toc.html"
      } ],
      "generation": "html"
    },
    "resource": [ {
      "name": "R4/B Topic-Based Subscription",
      "extension": [ {
        "url": "http://hl7.org/fhir/tools/StructureDefinition/resource-information",
        "valueString": "StructureDefinition:resource"
      } ],
      "reference": {
        "reference": "StructureDefinition/backport-subscription"
      },
      "description": "Profile on the Subscription resource to enable R5-style topic-based subscriptions in FHIR R4 or R4B.",
      "exampleBoolean": false
    }, {
      "name": "R4B Topic-Based Subscription Notification Bundle",
      "extension": [ {
        "url": "http://hl7.org/fhir/tools/StructureDefinition/resource-information",
        "valueString": "StructureDefinition:resource"
      } ],
      "reference": {
        "reference": "StructureDefinition/backport-subscription-notification"
      },
      "description": "Profile on the R4B Bundle resource to enable R5-style topic-based subscription notifications in FHIR R4B.",
      "exampleBoolean": false
    }, {
      "name": "R4 Topic-Based Subscription Notification Bundle",
      "extension": [ {
        "url": "http://hl7.org/fhir/tools/StructureDefinition/resource-information",
        "valueString": "StructureDefinition:resource"
      } ],
      "reference": {
        "reference": "StructureDefinition/backport-subscription-notification-r4"
      },
      "description": "Profile on the R4 Bundle resource to enable R5-style topic-based subscription notifications in FHIR R4.",
      "exampleBoolean": false
    }, {
      "name": "R4 Backported R5 SubscriptionStatus",
      "extension": [ {
        "url": "http://hl7.org/fhir/tools/StructureDefinition/resource-information",
        "valueString": "StructureDefinition:resource"
      } ],
      "reference": {
        "reference": "StructureDefinition/backport-subscription-status-r4"
      },
      "description": "Profile on Parameters for topic-based subscription notifications in R4.",
      "exampleBoolean": false
    }, {
      "name": "Backported R5 Additional Channel Types",
      "extension": [ {
        "url": "http://hl7.org/fhir/tools/StructureDefinition/resource-information",
        "valueString": "StructureDefinition:extension"
      } ],
      "reference": {
        "reference": "StructureDefinition/backport-channel-type"
      },
      "description": "Additional channel types not defined before FHIR R5.",
      "exampleBoolean": false
    }, {
      "name": "Backported R5 FilterBy Criteria",
      "extension": [ {
        "url": "http://hl7.org/fhir/tools/StructureDefinition/resource-information",
        "valueString": "StructureDefinition:extension"
      } ],
      "reference": {
        "reference": "StructureDefinition/backport-filter-criteria"
      },
      "description": "Criteria for topic-based filtering (filter-by).",
      "exampleBoolean": false
    }, {
      "name": "Backport R5 Subscription Heartbeat Period",
      "extension": [ {
        "url": "http://hl7.org/fhir/tools/StructureDefinition/resource-information",
        "valueString": "StructureDefinition:extension"
      } ],
      "reference": {
        "reference": "StructureDefinition/backport-heartbeat-period"
      },
      "description": "Interval in seconds to send 'heartbeat' notifications.",
      "exampleBoolean": false
    }, {
      "name": "Backported R5 Subscription MaxCount",
      "extension": [ {
        "url": "http://hl7.org/fhir/tools/StructureDefinition/resource-information",
        "valueString": "StructureDefinition:extension"
      } ],
      "reference": {
        "reference": "StructureDefinition/backport-max-count"
      },
      "description": "Maximum number of triggering resources included in notification bundles.",
      "exampleBoolean": false
    }, {
      "name": "Backport R5 Subscription Payload Content Information",
      "extension": [ {
        "url": "http://hl7.org/fhir/tools/StructureDefinition/resource-information",
        "valueString": "StructureDefinition:extension"
      } ],
      "reference": {
        "reference": "StructureDefinition/backport-payload-content"
      },
      "description": "How much of the resource content to deliver in the notification payload. The choices are an empty payload, only the resource id, or the full resource content.",
      "exampleBoolean": false
    }, {
      "name": "Backport R5 Subscription Timeout",
      "extension": [ {
        "url": "http://hl7.org/fhir/tools/StructureDefinition/resource-information",
        "valueString": "StructureDefinition:extension"
      } ],
      "reference": {
        "reference": "StructureDefinition/backport-timeout"
      },
      "description": "Timeout in seconds to attempt notification delivery.",
      "exampleBoolean": false
    }, {
      "name": "CapabilityStatement SubscriptionTopic Canonical",
      "extension": [ {
        "url": "http://hl7.org/fhir/tools/StructureDefinition/resource-information",
        "valueString": "StructureDefinition:extension"
      } ],
      "reference": {
        "reference": "StructureDefinition/capabilitystatement-subscriptiontopic-canonical"
      },
      "description": "Extension used to advertise supported SubscriptionTopic canonical URLs in a CapabilityStatement.",
      "exampleBoolean": false
    }, {
      "name": "Backported R5 Subscription Content Value Set",
      "extension": [ {
        "url": "http://hl7.org/fhir/tools/StructureDefinition/resource-information",
        "valueString": "ValueSet"
      } ],
      "reference": {
        "reference": "ValueSet/backport-content-value-set"
      },
      "description": "Codes to represent how much resource content to send in the notification payload.",
      "exampleBoolean": false
    }, {
      "name": "Backported R5 Subscription Content Code System",
      "extension": [ {
        "url": "http://hl7.org/fhir/tools/StructureDefinition/resource-information",
        "valueString": "CodeSystem"
      } ],
      "reference": {
        "reference": "CodeSystem/backport-content-code-system"
      },
      "description": "Codes to represent how much resource content to send in the notification payload.",
      "exampleBoolean": false
    }, {
      "name": "Search by custom channel types used for notifications",
      "extension": [ {
        "url": "http://hl7.org/fhir/tools/StructureDefinition/resource-information",
        "valueString": "SearchParameter"
      } ],
      "reference": {
        "reference": "SearchParameter/Subscription-custom-channel"
      },
      "description": "This SearchParameter enables query of subscriptions by additional channel type.",
      "exampleBoolean": false
    }, {
      "name": "Search by the filtering criteria used to narrow a topic-based subscription topic",
      "extension": [ {
        "url": "http://hl7.org/fhir/tools/StructureDefinition/resource-information",
        "valueString": "SearchParameter"
      } ],
      "reference": {
        "reference": "SearchParameter/Subscription-filter-criteria"
      },
      "description": "This SearchParameter enables query of subscriptions by filter criteria.",
      "exampleBoolean": false
    }, {
      "name": "Search by payload types used for notifications",
      "extension": [ {
        "url": "http://hl7.org/fhir/tools/StructureDefinition/resource-information",
        "valueString": "SearchParameter"
      } ],
      "reference": {
        "reference": "SearchParameter/Subscription-payload-type"
      },
      "description": "This SearchParameter enables query of subscriptions by payload type.",
      "exampleBoolean": false
    }, {
      "name": "Search by Canonical URL used in a topic-based subscription",
      "extension": [ {
        "url": "http://hl7.org/fhir/tools/StructureDefinition/resource-information",
        "valueString": "SearchParameter"
      } ],
      "reference": {
        "reference": "SearchParameter/Subscription-topic"
      },
      "description": "This SearchParameter enables query of subscriptions by canonical topic-url.",
      "exampleBoolean": false
    }, {
      "name": "Subscription Events Operation",
      "extension": [ {
        "url": "http://hl7.org/fhir/tools/StructureDefinition/resource-information",
        "valueString": "OperationDefinition"
      } ],
      "reference": {
        "reference": "OperationDefinition/backport-subscription-events"
      },
      "description": "This operation is used to return historical events in the backported R5-Style Subscriptions.",
      "exampleBoolean": false
    }, {
      "name": "Get WS Binding Token for Subscription Operation",
      "extension": [ {
        "url": "http://hl7.org/fhir/tools/StructureDefinition/resource-information",
        "valueString": "OperationDefinition"
      } ],
      "reference": {
        "reference": "OperationDefinition/backport-subscription-get-ws-binding-token"
      },
      "description": "This operation is used to get a token for a websocket client to use in order to bind to one or more subscriptions.",
      "exampleBoolean": false
    }, {
      "name": "R4B Topic-Based Subscription Server Capability Statement",
      "extension": [ {
        "url": "http://hl7.org/fhir/tools/StructureDefinition/resource-information",
        "valueString": "CapabilityStatement"
      } ],
      "reference": {
        "reference": "CapabilityStatement/backport-subscription-server"
      },
      "description": "CapabilityStatement describing the minimal required capabilities of a FHIR Server supporting backported R5 Subscriptions in R4B.",
      "exampleBoolean": false
    }, {
      "name": "R4 Topic-Based Subscription Server Capability Statement",
      "extension": [ {
        "url": "http://hl7.org/fhir/tools/StructureDefinition/resource-information",
        "valueString": "CapabilityStatement"
      } ],
      "reference": {
        "reference": "CapabilityStatement/backport-subscription-server-r4"
      },
      "description": "CapabilityStatement describing the minimal required capabilities of a FHIR Server supporting backported R5 Subscriptions in R4.",
      "exampleBoolean": false
    }, {
      "name": "Subscription Status Operation",
      "extension": [ {
        "url": "http://hl7.org/fhir/tools/StructureDefinition/resource-information",
        "valueString": "OperationDefinition"
      } ],
      "reference": {
        "reference": "OperationDefinition/backport-subscription-status"
      },
      "description": "This operation is used to return the current status information about one or more backported R5-Style Subscriptions in R4.",
      "exampleBoolean": false
    }, {
      "name": "R4 CapabilityStatement: Server Example",
      "extension": [ {
        "url": "http://hl7.org/fhir/tools/StructureDefinition/resource-information",
        "valueString": "CapabilityStatement"
      } ],
      "reference": {
        "reference": "CapabilityStatement/r4-capabilitystatement-example-server"
      },
      "description": "R4 example of a CapabilityStatement advertising support for topic-based subscriptions and a few topics.",
      "exampleBoolean": true
    }, {
      "name": "R4 Notification: Empty",
      "extension": [ {
        "url": "http://hl7.org/fhir/tools/StructureDefinition/resource-information",
        "valueString": "Bundle"
      } ],
      "reference": {
        "reference": "Bundle/r4-notification-empty"
      },
      "description": "R4 Example of a topic-based subscription event notification with `empty` content.",
      "exampleCanonical": "http://hl7.org/fhir/uv/subscriptions-backport/StructureDefinition/backport-subscription-notification-r4"
    }, {
      "name": "R4 Notification: Error",
      "extension": [ {
        "url": "http://hl7.org/fhir/tools/StructureDefinition/resource-information",
        "valueString": "Bundle"
      } ],
      "reference": {
        "reference": "Bundle/r4-notification-error"
      },
      "description": "R4 Example of a topic-based subscription query-status response with an error state.",
      "exampleCanonical": "http://hl7.org/fhir/uv/subscriptions-backport/StructureDefinition/backport-subscription-notification-r4"
    }, {
      "name": "R4 Notification: Full Resource",
      "extension": [ {
        "url": "http://hl7.org/fhir/tools/StructureDefinition/resource-information",
        "valueString": "Bundle"
      } ],
      "reference": {
        "reference": "Bundle/r4-notification-full-resource"
      },
      "description": "R4 Example of a topic-based subscription event notification with `full-resource` content.",
      "exampleCanonical": "http://hl7.org/fhir/uv/subscriptions-backport/StructureDefinition/backport-subscription-notification-r4"
    }, {
      "name": "R4 Notification: Handshake",
      "extension": [ {
        "url": "http://hl7.org/fhir/tools/StructureDefinition/resource-information",
        "valueString": "Bundle"
      } ],
      "reference": {
        "reference": "Bundle/r4-notification-handshake"
      },
      "description": "R4 Example of a topic-based subscription `handshake` notification.",
      "exampleCanonical": "http://hl7.org/fhir/uv/subscriptions-backport/StructureDefinition/backport-subscription-notification-r4"
    }, {
      "name": "R4 Notification: Heartbeat",
      "extension": [ {
        "url": "http://hl7.org/fhir/tools/StructureDefinition/resource-information",
        "valueString": "Bundle"
      } ],
      "reference": {
        "reference": "Bundle/r4-notification-heartbeat"
      },
      "description": "R4 Example of a topic-based subscription `heartbeat` notification.",
      "exampleCanonical": "http://hl7.org/fhir/uv/subscriptions-backport/StructureDefinition/backport-subscription-notification-r4"
    }, {
      "name": "R4 Notification: Id Only",
      "extension": [ {
        "url": "http://hl7.org/fhir/tools/StructureDefinition/resource-information",
        "valueString": "Bundle"
      } ],
      "reference": {
        "reference": "Bundle/r4-notification-id-only"
      },
      "description": "R4 Example of a topic-based subscription event notification with `id-only` content.",
      "exampleCanonical": "http://hl7.org/fhir/uv/subscriptions-backport/StructureDefinition/backport-subscription-notification-r4"
    }, {
      "name": "R4 Notification: Multiple Resources",
      "extension": [ {
        "url": "http://hl7.org/fhir/tools/StructureDefinition/resource-information",
        "valueString": "Bundle"
      } ],
      "reference": {
        "reference": "Bundle/r4-notification-multi-resource"
      },
      "description": "R4 Example of a topic-based subscription event notification with `full-resource` content and a related resource.",
      "exampleCanonical": "http://hl7.org/fhir/uv/subscriptions-backport/StructureDefinition/backport-subscription-notification-r4"
    }, {
      "name": "R4 Notification: Status",
      "extension": [ {
        "url": "http://hl7.org/fhir/tools/StructureDefinition/resource-information",
        "valueString": "Parameters"
      } ],
      "reference": {
        "reference": "Parameters/r4-notification-status"
      },
      "description": "R4 Example of a topic-based subscription notification with status content.",
      "exampleCanonical": "http://hl7.org/fhir/uv/subscriptions-backport/StructureDefinition/backport-subscription-status-r4"
    }, {
      "name": "R4B Notification: Empty",
      "extension": [ {
        "url": "http://hl7.org/fhir/tools/StructureDefinition/resource-information",
        "valueString": "Bundle"
      } ],
      "reference": {
        "reference": "Bundle/r4b-notification-empty"
      },
      "description": "R4B Example of a topic-based subscription event notification with `empty` content.",
      "exampleCanonical": "http://hl7.org/fhir/uv/subscriptions-backport/StructureDefinition/backport-subscription-notification"
    }, {
      "name": "R4B Notification: Error",
      "extension": [ {
        "url": "http://hl7.org/fhir/tools/StructureDefinition/resource-information",
        "valueString": "Bundle"
      } ],
      "reference": {
        "reference": "Bundle/r4b-notification-error"
      },
      "description": "R4B Example of a topic-based subscription query-status response with an error state.",
      "exampleCanonical": "http://hl7.org/fhir/uv/subscriptions-backport/StructureDefinition/backport-subscription-notification"
    }, {
      "name": "R4B Notification: Full Resource",
      "extension": [ {
        "url": "http://hl7.org/fhir/tools/StructureDefinition/resource-information",
        "valueString": "Bundle"
      } ],
      "reference": {
        "reference": "Bundle/r4b-notification-full-resource"
      },
      "description": "R4B Example of a topic-based subscription event notification with `full-resource` content.",
      "exampleCanonical": "http://hl7.org/fhir/uv/subscriptions-backport/StructureDefinition/backport-subscription-notification"
    }, {
      "name": "R4B Notification: Handshake",
      "extension": [ {
        "url": "http://hl7.org/fhir/tools/StructureDefinition/resource-information",
        "valueString": "Bundle"
      } ],
      "reference": {
        "reference": "Bundle/r4b-notification-handshake"
      },
      "description": "R4B Example of a topic-based subscription `handshake` notification.",
      "exampleCanonical": "http://hl7.org/fhir/uv/subscriptions-backport/StructureDefinition/backport-subscription-notification"
    }, {
      "name": "R4B Notification: Heartbeat",
      "extension": [ {
        "url": "http://hl7.org/fhir/tools/StructureDefinition/resource-information",
        "valueString": "Bundle"
      } ],
      "reference": {
        "reference": "Bundle/r4b-notification-heartbeat"
      },
      "description": "R4B Example of a topic-based subscription `heartbeat` notification.",
      "exampleCanonical": "http://hl7.org/fhir/uv/subscriptions-backport/StructureDefinition/backport-subscription-notification"
    }, {
      "name": "R4B Notification: Id Only",
      "extension": [ {
        "url": "http://hl7.org/fhir/tools/StructureDefinition/resource-information",
        "valueString": "Bundle"
      } ],
      "reference": {
        "reference": "Bundle/r4b-notification-id-only"
      },
      "description": "R4B Example of a topic-based subscription event notification with `id-only` content.",
      "exampleCanonical": "http://hl7.org/fhir/uv/subscriptions-backport/StructureDefinition/backport-subscription-notification"
    }, {
      "name": "R4B Notification: Multiple Resources",
      "extension": [ {
        "url": "http://hl7.org/fhir/tools/StructureDefinition/resource-information",
        "valueString": "Bundle"
      } ],
      "reference": {
        "reference": "Bundle/r4b-notification-multi-resource"
      },
      "description": "R4B Example of a topic-based subscription event notification with `full-resource` content and a related resource.",
      "exampleCanonical": "http://hl7.org/fhir/uv/subscriptions-backport/StructureDefinition/backport-subscription-notification"
    }, {
      "name": "R4B Notification: Status",
      "extension": [ {
        "url": "http://hl7.org/fhir/tools/StructureDefinition/resource-information",
        "valueString": "SubscriptionStatus"
      } ],
      "reference": {
        "reference": "SubscriptionStatus/r4b-notification-status"
      },
      "description": "R4B Example of a topic-based subscription notification with status content.",
      "exampleBoolean": true
    }, {
      "name": "Backported Subscription: Admission",
      "extension": [ {
        "url": "http://hl7.org/fhir/tools/StructureDefinition/resource-information",
        "valueString": "Subscription"
      } ],
      "reference": {
        "reference": "Subscription/subscription-admission"
      },
      "description": "R4/B Example of a topic-based 'admission' subscription.",
      "exampleCanonical": "http://hl7.org/fhir/uv/subscriptions-backport/StructureDefinition/backport-subscription"
    }, {
      "name": "Backported Subscription: Multi-Resource",
      "extension": [ {
        "url": "http://hl7.org/fhir/tools/StructureDefinition/resource-information",
        "valueString": "Subscription"
      } ],
      "reference": {
        "reference": "Subscription/subscription-multi-resource"
      },
      "description": "R4/B Example of a topic-based subscription with additional context resources.",
      "exampleCanonical": "http://hl7.org/fhir/uv/subscriptions-backport/StructureDefinition/backport-subscription"
    }, {
      "name": "Backported Subscription: Custom Channel",
      "extension": [ {
        "url": "http://hl7.org/fhir/tools/StructureDefinition/resource-information",
        "valueString": "Subscription"
      } ],
      "reference": {
        "reference": "Subscription/subscription-zulip"
      },
      "description": "R4/B Example of a topic-based subscription using a custom channel.",
      "exampleCanonical": "http://hl7.org/fhir/uv/subscriptions-backport/StructureDefinition/backport-subscription"
    } ],
    "extension": [ {
      "url": "http://hl7.org/fhir/tools/StructureDefinition/ig-parameter",
      "extension": [ {
        "url": "code",
        "valueString": "copyrightyear"
      }, {
        "url": "value",
        "valueString": "2020+"
      } ]
    }, {
      "url": "http://hl7.org/fhir/tools/StructureDefinition/ig-parameter",
      "extension": [ {
        "url": "code",
        "valueString": "releaselabel"
      }, {
        "url": "value",
        "valueString": "Standard for Trial Use"
      } ]
    }, {
      "url": "http://hl7.org/fhir/tools/StructureDefinition/ig-parameter",
      "extension": [ {
        "url": "code",
        "valueString": "show-inherited-invariants"
      }, {
        "url": "value",
        "valueString": "false"
      } ]
    }, {
      "url": "http://hl7.org/fhir/tools/StructureDefinition/ig-parameter",
      "extension": [ {
        "url": "code",
        "valueString": "usage-stats-opt-out"
      }, {
        "url": "value",
        "valueString": "true"
      } ]
    }, {
      "url": "http://hl7.org/fhir/tools/StructureDefinition/ig-parameter",
      "extension": [ {
        "url": "code",
        "valueString": "shownav"
      }, {
        "url": "value",
        "valueString": "true"
      } ]
    }, {
      "url": "http://hl7.org/fhir/tools/StructureDefinition/ig-parameter",
      "extension": [ {
        "url": "code",
        "valueString": "r4-exclusion"
      }, {
        "url": "value",
        "valueString": "http://hl7.org/fhir/uv/subscriptions-backport/StructureDefinition/backport-subscription-notification"
      } ]
    }, {
      "url": "http://hl7.org/fhir/tools/StructureDefinition/ig-parameter",
      "extension": [ {
        "url": "code",
        "valueString": "r4-exclusion"
      }, {
        "url": "value",
        "valueString": "SubscriptionStatus/r4b-notification-status"
      } ]
    }, {
      "url": "http://hl7.org/fhir/tools/StructureDefinition/ig-parameter",
      "extension": [ {
        "url": "code",
        "valueString": "r4-exclusion"
      }, {
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