{
  "types": [
    "MessageHeader"
  ],
  "MessageHeader": {
    "elements": {
      "MessageHeader.event[x]": {
        "old-name": "event",
        "added-types": [
          "uri"
        ]
      },
      "MessageHeader.destination.endpoint": {
        "removed-types": [
          "uri"
        ],
        "added-types": [
          "url"
        ]
      },
      "MessageHeader.destination.receiver": {
        "removed-types": [
          "Reference(Practitioner | Organization)"
        ],
        "added-types": [
          "Reference(Practitioner | PractitionerRole | Organization)"
        ]
      },
      "MessageHeader.sender": {
        "removed-types": [
          "Reference(Practitioner | Organization)"
        ],
        "added-types": [
          "Reference(Practitioner | PractitionerRole | Organization)"
        ]
      },
      "MessageHeader.enterer": {
        "removed-types": [
          "Reference(Practitioner)"
        ],
        "added-types": [
          "Reference(Practitioner | PractitionerRole)"
        ]
      },
      "MessageHeader.author": {
        "removed-types": [
          "Reference(Practitioner)"
        ],
        "added-types": [
          "Reference(Practitioner | PractitionerRole)"
        ]
      },
      "MessageHeader.source.endpoint": {
        "removed-types": [
          "uri"
        ],
        "added-types": [
          "url"
        ]
      },
      "MessageHeader.responsible": {
        "removed-types": [
          "Reference(Practitioner | Organization)"
        ],
        "added-types": [
          "Reference(Practitioner | PractitionerRole | Organization)"
        ]
      },
      "MessageHeader.response.code": {
        "binding-valueset-changed": true,
        "binding-status": "changed",
        "old-binding": {
          "reference": "http://hl7.org/fhir/ValueSet/response-code",
          "strength": "required"
        },
        "new-binding": {
          "reference": "http://hl7.org/fhir/ValueSet/response-code|4.0.1",
          "strength": "required"
        }
      },
      "MessageHeader.definition": {
        "status": "new"
      },
      "MessageHeader.timestamp": {
        "status": "deleted"
      }
    },
    "status": "changed"
  }
}