{
  "resourceType": "StructureDefinition",
  "url": "https://example.org/fhir/StructureDefinition/MyObservation",
  "name": "MyObservation",
  "status": "draft",
  "description": "Observation for testing demo etc",
  "fhirVersion": "4.0.1",
  "kind": "resource",
  "abstract": false,
  "type": "Observation",
  "baseDefinition": "http://hl7.org/fhir/StructureDefinition/Observation",
  "derivation": "constraint",
  "differential": {
    "element": [
      {
        "id": "Observation",
        "path": "Observation",
        "definition": "Observation for testing demo etc",
        "constraint": [
          {
            "key": "JSM-1",
            "severity": "error",
            "human": "incomplete (value or notes)",
            "expression": "value.exists() or note.exists()"
          }
        ]
      },
      {
        "id": "Observation.extension",
        "path": "Observation.extension",
        "slicing": {
          "discriminator": [
            {
              "type": "value",
              "path": "url"
            }
          ],
          "rules": "open"
        },
        "min": 1
      },
      {
        "id": "Observation.extension:Laterality",
        "path": "Observation.extension",
        "sliceName": "Laterality",
        "min": 1,
        "max": "1",
        "type": [
          {
            "code": "Extension",
            "profile": [
              "https://NCA.org/fhir/StructureDefinition/LateralityExtension"
            ]
          }
        ],
        "isModifier": false
      },
      {
        "id": "Observation.extension:myExtension",
        "path": "Observation.extension",
        "sliceName": "myExtension",
        "min": 0,
        "type": [
          {
            "code": "Extension",
            "profile": [
              "https://NCA.org/fhir/StructureDefinition/EnvironmentExtension"
            ]
          }
        ],
        "mustSupport": true,
        "isModifier": false
      },
      {
        "id": "Observation.code.coding",
        "path": "Observation.code.coding",
        "fixedCoding": {
          "system": "http://snomed.info/sct",
          "code": "118230007",
          "display": "Hearing finding"
        }
      },
      {
        "id": "Observation.subject",
        "path": "Observation.subject",
        "min": 1,
        "type": [
          {
            "code": "Reference",
            "profile": [
              "https://NCA.org/fhir/StructureDefinition/JSMPatient"
            ]
          }
        ],
        "mustSupport": true
      },
      {
        "id": "Observation.subject.identifier",
        "path": "Observation.subject.identifier",
        "slicing": {
          "discriminator": [
            {
              "type": "value",
              "path": "system"
            }
          ],
          "rules": "open"
        },
        "min": 1
      },
      {
        "id": "Observation.subject.telecom",
        "path": "Observation.subject.telecom",
        "slicing": {
          "discriminator": [
            {
              "type": "value",
              "path": "use"
            }
          ],
          "rules": "open"
        }
      },
      {
        "id": "Observation.value[x]",
        "path": "Observation.value[x]",
        "min": 1,
        "type": [
          {
            "code": "CodeableConcept"
          }
        ],
        "condition": [
          "JSM-1"
        ]
      },
      {
        "id": "Observation.note",
        "path": "Observation.note",
        "condition": [
          "JSM-1"
        ],
        "mustSupport": true
      },
      {
        "id": "Observation.method",
        "path": "Observation.method",
        "min": 1
      },
      {
        "id": "Observation.device",
        "path": "Observation.device",
        "type": [
          {
            "code": "Reference",
            "targetProfile": [
              "http://hl7.org/fhir/StructureDefinition/Device"
            ]
          }
        ],
        "mustSupport": true
      },
      {
        "id": "Observation.device.reference",
        "path": "Observation.device.reference",
        "mustSupport": true
      },
      {
        "id": "Observation.derivedFrom",
        "path": "Observation.derivedFrom",
        "type": [
          {
            "code": "Reference",
            "targetProfile": [
              "http://hl7.org/fhir/StructureDefinition/Media"
            ]
          }
        ]
      },
      {
        "id": "Observation.derivedFrom.reference",
        "path": "Observation.derivedFrom.reference",
        "mustSupport": true
      },
      {
        "id": "Observation.component.referenceRange",
        "path": "Observation.component.referenceRange",
        "contentReference": "http://hl7.org/fhir/StructureDefinition/Observation#Observation.referenceRange"
      }
    ]
  }
}