{
  "resourceType": "StructureDefinition",
  "id": "2ea5d124-0227-4f0e-87a9-79a57b342996",
  "meta": {
    "lastUpdated": "2020-02-21T07:54:01.533+00:00"
  },
  "url": "http://example.org/fhir/StructureDefinition/CTAExtension",
  "name": "CTAExtension",
  "status": "draft",
  "date": "2020-02-21T07:54:40.4276044+00:00",
  "fhirVersion": "4.0.0",
  "mapping": [
    {
      "identity": "rim",
      "uri": "http://hl7.org/v3",
      "name": "RIM Mapping"
    }
  ],
  "kind": "complex-type",
  "abstract": false,
  "context": [
    {
      "type": "element",
      "expression": "Observation"
    }
  ],
  "type": "Extension",
  "baseDefinition": "http://hl7.org/fhir/StructureDefinition/Extension",
  "derivation": "constraint",
  "differential": {
    "element": [
      {
        "id": "Extension",
        "path": "Extension",
        "min": 1,
        "max": "1"
      },
      {
        "id": "Extension.extension",
        "path": "Extension.extension",
        "slicing": {
          "discriminator": [
            {
              "type": "value",
              "path": "url"
            }
          ],
          "rules": "open"
        }
      },
      {
        "id": "Extension.extension:Blood_vessel_density",
        "path": "Extension.extension",
        "sliceName": "Blood_vessel_density",
        "min": 1,
        "max": "1"
      },
      {
        "id": "Extension.extension:Blood_vessel_density.url",
        "path": "Extension.extension.url",
        "fixedUri": "Blood_vessel_density"
      },
      {
        "id": "Extension.extension:Blood_vessel_density.value[x]",
        "path": "Extension.extension.value[x]",
        "min": 1,
        "type": [
          {
            "code": "Quantity",
            "profile": [
              "http://hl7.org/fhir/StructureDefinition/SimpleQuantity"
            ]
          }
        ]
      },
      {
        "id": "Extension.extension:Blood_vessel_density.value[x].value",
        "path": "Extension.extension.value[x].value",
        "minValueDecimal": 0,
        "maxValueDecimal": 100
      },
      {
        "id": "Extension.extension:Blood_vessel_density.value[x].unit",
        "path": "Extension.extension.value[x].unit",
        "fixedString": "%"
      },
      {
        "id": "Extension.extension:Blood_vessel_density.value[x].system",
        "path": "Extension.extension.value[x].system",
        "fixedUri": "http://unitsofmeasure.org"
      },
      {
        "id": "Extension.extension:Blood_vessel_density.value[x].code",
        "path": "Extension.extension.value[x].code",
        "fixedCode": "%"
      },
      {
        "id": "Extension.extension:Eval_date",
        "path": "Extension.extension",
        "sliceName": "Eval_date",
        "min": 1,
        "max": "1"
      },
      {
        "id": "Extension.extension:Eval_date.url",
        "path": "Extension.extension.url",
        "fixedUri": "Eval_date"
      },
      {
        "id": "Extension.extension:Eval_date.value[x]",
        "path": "Extension.extension.value[x]",
        "min": 1,
        "type": [
          {
            "code": "dateTime"
          }
        ]
      },
      {
        "id": "Extension.url",
        "path": "Extension.url",
        "fixedUri": "http://example.org/fhir/StructureDefinition/CTAExtension"
      },
      {
        "id": "Extension.value[x]",
        "path": "Extension.value[x]",
        "max": "0"
      }
    ]
  }
}