{
  "resourceType": "StructureDefinition",
  "meta": {
    "lastUpdated": "2022-01-01T04:39:23.639+00:00"
  },
  "url": "http://example.org/fhir/StructureDefinition/patient-bloodType",
  "name": "PatientBloodType",
  "title": "Patient Blood Type",
  "status": "draft",
  "date": "2022-01-01T04:37:11.5573828+00:00",
  "description": "Capture the patient’s blood type.",
  "purpose": "This extension developed for the training course.",
  "fhirVersion": "4.0.1",
  "kind": "complex-type",
  "abstract": false,
  "context": [
    {
      "type": "element",
      "expression": "Patient"
    }
  ],
  "type": "Extension",
  "baseDefinition": "http://hl7.org/fhir/StructureDefinition/Extension",
  "derivation": "constraint",
  "differential": {
    "element": [
      {
        "id": "Extension",
        "path": "Extension",
        "max": "1"
      },
      {
        "id": "Extension.url",
        "path": "Extension.url",
        "fixedUri": "http://example.org/fhir/StructureDefinition/patient-bloodType"
      },
      {
        "id": "Extension.value[x]",
        "path": "Extension.value[x]",
        "min": 1,
        "type": [
          {
            "code": "Coding"
          }
        ],
        "binding": {
          "strength": "preferred",
          "valueSet": "http://example.org/fhir/ValueSet/ABO-blood"
        }
      },
      {
        "id": "Extension.value[x].system",
        "path": "Extension.value[x].system",
        "min": 1
      },
      {
        "id": "Extension.value[x].version",
        "path": "Extension.value[x].version",
        "max": "0"
      },
      {
        "id": "Extension.value[x].code",
        "path": "Extension.value[x].code",
        "min": 1
      },
      {
        "id": "Extension.value[x].userSelected",
        "path": "Extension.value[x].userSelected",
        "max": "0"
      }
    ]
  }
}