{
  "resourceType": "StructureDefinition",
  "meta": {
    "lastUpdated": "2019-12-14T05:18:42.607+00:00"
  },
  "url": "http://example.org/fhir/StructureDefinition/ext-procedure-timestamp",
  "name": "MyExtension",
  "status": "draft",
  "date": "2019-12-14T05:18:45.929639+00:00",
  "description": "This is an extension.",
  "fhirVersion": "4.0.0",
  "mapping": [
    {
      "identity": "rim",
      "uri": "http://hl7.org/v3",
      "name": "RIM Mapping"
    }
  ],
  "kind": "complex-type",
  "abstract": false,
  "context": [
    {
      "type": "element",
      "expression": "Procedure"
    }
  ],
  "type": "Extension",
  "baseDefinition": "http://hl7.org/fhir/StructureDefinition/Extension",
  "derivation": "constraint",
  "differential": {
    "element": [
      {
        "id": "Extension.url",
        "path": "Extension.url",
        "fixedUri": "http://example.org/fhir/StructureDefinition/ext-procedure-timestamp"
      },
      {
        "id": "Extension.value[x]",
        "path": "Extension.value[x]",
        "type": [
          {
            "code": "dateTime"
          }
        ]
      }
    ]
  }
}