{
  "resourceType": "StructureDefinition",
  "url": "https://nely.example.org/StructureDefinition/birthTime-extension",
  "name": "birthTime",
  "status": "draft",
  "date": "2018-03-14T11:41:34.225+00:00",
  "description": "Time of birth can be stored",
  "fhirVersion": "3.0.1",
  "kind": "complex-type",
  "abstract": false,
  "contextType": "resource",
  "context": [
    "Patient"
  ],
  "type": "Extension",
  "baseDefinition": "http://hl7.org/fhir/StructureDefinition/Extension",
  "derivation": "constraint",
  "differential": {
    "element": [
      {
        "id": "Extension.url",
        "path": "Extension.url",
        "fixedUri": "https://nely.example.org/StructureDefinition/birthTime-extension"
      },
      {
        "id": "Extension.value[x]:valueTime",
        "path": "Extension.valueTime",
        "sliceName": "valueTime",
        "type": [
          {
            "code": "time"
          }
        ]
      }
    ]
  }
}