{
  "resourceType": "StructureDefinition",
  "meta": {
    "lastUpdated": "2019-04-29T13:40:07.2443932+00:00"
  },
  "url": "http://example.org/fhir/StructureDefinition/MyObservation",
  "name": "BloodPresssureLOINC",
  "status": "draft",
  "date": "2019-04-29T13:40:07.2602567+00:00",
  "description": "A simple profile on observation to encode blood pressure using LOINC codes",
  "fhirVersion": "3.0.1",
  "kind": "resource",
  "abstract": false,
  "type": "Observation",
  "baseDefinition": "http://hl7.org/fhir/StructureDefinition/Observation",
  "derivation": "constraint",
  "differential": {
    "element": [
      {
        "id": "Observation.code.coding",
        "path": "Observation.code.coding",
        "min": 1,
        "max": "1"
      },
      {
        "id": "Observation.code.coding.system",
        "path": "Observation.code.coding.system",
        "min": 1,
        "fixedUri": "http://loinc.org"
      },
      {
        "id": "Observation.code.coding.code",
        "path": "Observation.code.coding.code",
        "min": 1,
        "fixedCode": "85354-9"
      },
      {
        "id": "Observation.component",
        "path": "Observation.component",
        "slicing": {
          "discriminator": [
            {
              "type": "value",
              "path": "code"
            }
          ],
          "rules": "open"
        }
      },
      {
        "id": "Observation.component:diastolic",
        "path": "Observation.component",
        "sliceName": "diastolic",
        "min": 1,
        "max": "1"
      },
      {
        "id": "Observation.component:diastolic.code.coding.system",
        "path": "Observation.component.code.coding.system",
        "fixedUri": "http://loinc.org"
      },
      {
        "id": "Observation.component:diastolic.code.coding.code",
        "path": "Observation.component.code.coding.code",
        "short": "Diastolic Blood Pressure",
        "fixedCode": "8462-4"
      },
      {
        "id": "Observation.component:diastolic.value[x]:valueQuantity",
        "path": "Observation.component.valueQuantity",
        "sliceName": "valueQuantity",
        "min": 1,
        "type": [
          {
            "code": "Quantity"
          }
        ]
      },
      {
        "id": "Observation.component:diastolic.value[x]:valueQuantity.unit",
        "extension": [
          {
            "url": "http://hl7.org/fhir/StructureDefinition/elementdefinition-translatable",
            "valueBoolean": true
          }
        ],
        "path": "Observation.component.valueQuantity.unit",
        "min": 1,
        "fixedString": "mmHg"
      },
      {
        "id": "Observation.component:diastolic.value[x]:valueQuantity.system",
        "path": "Observation.component.valueQuantity.system",
        "min": 1,
        "fixedUri": "http://unitsofmeasure.org"
      },
      {
        "id": "Observation.component:diastolic.value[x]:valueQuantity.code",
        "path": "Observation.component.valueQuantity.code",
        "min": 1,
        "fixedCode": "mm[Hg]"
      },
      {
        "id": "Observation.component:systolic",
        "path": "Observation.component",
        "sliceName": "systolic",
        "min": 1,
        "max": "1"
      },
      {
        "id": "Observation.component:systolic.code.coding.system",
        "path": "Observation.component.code.coding.system",
        "fixedUri": "http://loinc.org"
      },
      {
        "id": "Observation.component:systolic.code.coding.code",
        "path": "Observation.component.code.coding.code",
        "short": "Systolic Blood Pressure",
        "fixedCode": "8480-6"
      },
      {
        "id": "Observation.component:systolic.value[x]:valueQuantity",
        "path": "Observation.component.valueQuantity",
        "sliceName": "valueQuantity",
        "min": 1,
        "type": [
          {
            "code": "Quantity"
          }
        ]
      },
      {
        "id": "Observation.component:systolic.value[x]:valueQuantity.unit",
        "extension": [
          {
            "url": "http://hl7.org/fhir/StructureDefinition/elementdefinition-translatable",
            "valueBoolean": true
          }
        ],
        "path": "Observation.component.valueQuantity.unit",
        "min": 1,
        "fixedString": "mmHg"
      },
      {
        "id": "Observation.component:systolic.value[x]:valueQuantity.system",
        "path": "Observation.component.valueQuantity.system",
        "min": 1,
        "fixedUri": "http://unitsofmeasure.org"
      },
      {
        "id": "Observation.component:systolic.value[x]:valueQuantity.code",
        "path": "Observation.component.valueQuantity.code",
        "min": 1,
        "fixedCode": "mm[Hg]"
      }
    ]
  }
}