{
  "types": [
    "MessageDefinition"
  ],
  "MessageDefinition": {
    "elements": {
      "MessageDefinition.identifier": {
        "old-max": "1",
        "new-max": "*"
      },
      "MessageDefinition.replaces": {
        "removed-types": [
          "Reference(MessageDefinition)"
        ],
        "added-types": [
          "canonical(MessageDefinition)"
        ]
      },
      "MessageDefinition.status": {
        "binding-valueset-changed": true,
        "binding-status": "changed",
        "old-binding": {
          "reference": "http://hl7.org/fhir/ValueSet/publication-status",
          "strength": "required"
        },
        "new-binding": {
          "reference": "http://hl7.org/fhir/ValueSet/publication-status|4.0.1",
          "strength": "required"
        }
      },
      "MessageDefinition.experimental": {
        "modifier": "removed"
      },
      "MessageDefinition.base": {
        "removed-types": [
          "Reference(MessageDefinition)"
        ],
        "added-types": [
          "canonical(MessageDefinition)"
        ]
      },
      "MessageDefinition.parent": {
        "removed-types": [
          "Reference(ActivityDefinition | PlanDefinition)"
        ],
        "added-types": [
          "canonical(ActivityDefinition | PlanDefinition)"
        ]
      },
      "MessageDefinition.event[x]": {
        "old-name": "event",
        "added-types": [
          "uri"
        ]
      },
      "MessageDefinition.category": {
        "binding-valueset-changed": true,
        "binding-status": "changed",
        "old-binding": {
          "reference": "http://hl7.org/fhir/ValueSet/message-significance-category",
          "strength": "required"
        },
        "new-binding": {
          "reference": "http://hl7.org/fhir/ValueSet/message-significance-category|4.0.1",
          "strength": "required"
        }
      },
      "MessageDefinition.focus.code": {
        "binding-valueset-changed": true,
        "binding-status": "changed",
        "old-binding": {
          "reference": "http://hl7.org/fhir/ValueSet/resource-types",
          "strength": "required"
        },
        "new-binding": {
          "reference": "http://hl7.org/fhir/ValueSet/resource-types|4.0.1",
          "strength": "required"
        }
      },
      "MessageDefinition.focus.profile": {
        "removed-types": [
          "Reference(StructureDefinition)"
        ],
        "added-types": [
          "canonical(StructureDefinition)"
        ]
      },
      "MessageDefinition.focus.min": {
        "old-min": 0,
        "new-min": 1,
        "default": "removed",
        "old-default": "\"0\""
      },
      "MessageDefinition.responseRequired": {
        "removed-types": [
          "boolean"
        ],
        "added-types": [
          "code"
        ],
        "binding-status": "added",
        "new-binding": {
          "reference": "http://hl7.org/fhir/ValueSet/messageheader-response-request|4.0.1",
          "strength": "required"
        },
        "default": "removed",
        "old-default": "\"false\""
      },
      "MessageDefinition.allowedResponse.message": {
        "removed-types": [
          "Reference(MessageDefinition)"
        ],
        "added-types": [
          "canonical(MessageDefinition)"
        ]
      },
      "MessageDefinition.graph": {
        "status": "new"
      }
    },
    "status": "changed"
  }
}