{
  "resourceType": "StructureDefinition",
  "url": "https://example.org/fhir/StructureDefinition/StepsObservation",
  "name": "StepsObservation",
  "status": "draft",
  "fhirVersion": "3.0.2",
  "kind": "resource",
  "abstract": false,
  "type": "Observation",
  "baseDefinition": "http://hl7.org/fhir/StructureDefinition/Observation",
  "derivation": "constraint",
  "differential": {
    "element": [
      {
        "id": "Observation.identifier",
        "path": "Observation.identifier",
        "max": "0"
      },
      {
        "id": "Observation.basedOn",
        "path": "Observation.basedOn",
        "max": "0"
      },
      {
        "id": "Observation.status",
        "path": "Observation.status",
        "fixedCode": "final"
      },
      {
        "id": "Observation.category",
        "path": "Observation.category",
        "min": 1,
        "max": "1"
      },
      {
        "id": "Observation.category.coding",
        "path": "Observation.category.coding",
        "min": 1,
        "max": "1"
      },
      {
        "id": "Observation.category.coding.system",
        "path": "Observation.category.coding.system",
        "min": 1,
        "fixedUri": "http://terminology.hl7.org/CodeSystem/observation-category"
      },
      {
        "id": "Observation.category.coding.version",
        "path": "Observation.category.coding.version",
        "max": "0"
      },
      {
        "id": "Observation.category.coding.code",
        "path": "Observation.category.coding.code",
        "min": 1,
        "fixedCode": "activity"
      },
      {
        "id": "Observation.category.coding.display",
        "path": "Observation.category.coding.display",
        "min": 1,
        "fixedString": "Activity"
      },
      {
        "id": "Observation.category.coding.userSelected",
        "path": "Observation.category.coding.userSelected",
        "max": "0"
      },
      {
        "id": "Observation.category.text",
        "path": "Observation.category.text",
        "min": 1,
        "fixedString": "Number of Steps"
      },
      {
        "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.version",
        "path": "Observation.code.coding.version",
        "max": "0"
      },
      {
        "id": "Observation.code.coding.code",
        "path": "Observation.code.coding.code",
        "min": 1,
        "fixedCode": "55423-8"
      },
      {
        "id": "Observation.code.coding.display",
        "path": "Observation.code.coding.display",
        "min": 1,
        "fixedString": "Number of steps in unspecified time Pedometer"
      },
      {
        "id": "Observation.code.coding.userSelected",
        "path": "Observation.code.coding.userSelected",
        "max": "0"
      },
      {
        "id": "Observation.code.text",
        "path": "Observation.code.text",
        "min": 1,
        "fixedString": "Number of Steps"
      },
      {
        "id": "Observation.subject",
        "path": "Observation.subject",
        "max": "0"
      },
      {
        "id": "Observation.context",
        "path": "Observation.context",
        "max": "0"
      },
      {
        "id": "Observation.effective[x]:effectivePeriod",
        "path": "Observation.effectivePeriod",
        "sliceName": "effectivePeriod",
        "min": 1,
        "type": [
          {
            "code": "Period"
          }
        ]
      },
      {
        "id": "Observation.issued",
        "path": "Observation.issued",
        "max": "0"
      },
      {
        "id": "Observation.performer",
        "path": "Observation.performer",
        "max": "0"
      },
      {
        "id": "Observation.value[x]",
        "path": "Observation.value[x]",
        "max": "0"
      },
      {
        "id": "Observation.dataAbsentReason",
        "path": "Observation.dataAbsentReason",
        "max": "0"
      },
      {
        "id": "Observation.interpretation",
        "path": "Observation.interpretation",
        "max": "0"
      },
      {
        "id": "Observation.comment",
        "path": "Observation.comment",
        "max": "0"
      },
      {
        "id": "Observation.bodySite",
        "path": "Observation.bodySite",
        "max": "0"
      },
      {
        "id": "Observation.method",
        "path": "Observation.method",
        "max": "0"
      },
      {
        "id": "Observation.specimen",
        "path": "Observation.specimen",
        "max": "0"
      },
      {
        "id": "Observation.device",
        "path": "Observation.device",
        "min": 1,
        "type": [
          {
            "code": "Reference",
            "targetProfile": [
              "http://hl7.org/fhir/StructureDefinition/Device"
            ],
            "aggregation": [
              "contained"
            ]
          }
        ]
      },
      {
        "id": "Observation.referenceRange",
        "path": "Observation.referenceRange",
        "max": "0"
      },
      {
        "id": "Observation.related",
        "path": "Observation.related",
        "max": "0"
      },
      {
        "id": "Observation.component",
        "path": "Observation.component",
        "min": 1,
        "max": "1"
      },
      {
        "id": "Observation.component.code.coding",
        "path": "Observation.component.code.coding",
        "min": 1,
        "max": "1"
      },
      {
        "id": "Observation.component.code.coding.system",
        "path": "Observation.component.code.coding.system",
        "min": 1,
        "fixedUri": "http://loinc.org"
      },
      {
        "id": "Observation.component.code.coding.version",
        "path": "Observation.component.code.coding.version",
        "max": "0"
      },
      {
        "id": "Observation.component.code.coding.code",
        "path": "Observation.component.code.coding.code",
        "min": 1,
        "fixedCode": "55423-8"
      },
      {
        "id": "Observation.component.code.coding.display",
        "path": "Observation.component.code.coding.display",
        "min": 1,
        "fixedString": "Number of steps in unspecified time Pedometer"
      },
      {
        "id": "Observation.component.code.coding.userSelected",
        "path": "Observation.component.code.coding.userSelected",
        "max": "0"
      },
      {
        "id": "Observation.component.code.text",
        "path": "Observation.component.code.text",
        "min": 1,
        "fixedString": "Number of Steps"
      },
      {
        "id": "Observation.component.value[x]:valueQuantity",
        "path": "Observation.component.valueQuantity",
        "sliceName": "valueQuantity",
        "min": 1,
        "type": [
          {
            "code": "Quantity"
          }
        ]
      },
      {
        "id": "Observation.component.value[x]:valueQuantity.value",
        "path": "Observation.component.valueQuantity.value",
        "min": 1
      },
      {
        "id": "Observation.component.value[x]:valueQuantity.comparator",
        "path": "Observation.component.valueQuantity.comparator",
        "max": "0"
      },
      {
        "id": "Observation.component.value[x]:valueQuantity.unit",
        "path": "Observation.component.valueQuantity.unit",
        "min": 1,
        "fixedString": "steps"
      },
      {
        "id": "Observation.component.value[x]:valueQuantity.system",
        "path": "Observation.component.valueQuantity.system",
        "min": 1,
        "fixedUri": "http://unitsofmeasure.org"
      },
      {
        "id": "Observation.component.value[x]:valueQuantity.code",
        "path": "Observation.component.valueQuantity.code",
        "min": 1,
        "fixedCode": "{steps}"
      },
      {
        "id": "Observation.component.dataAbsentReason",
        "path": "Observation.component.dataAbsentReason",
        "max": "0"
      },
      {
        "id": "Observation.component.interpretation",
        "path": "Observation.component.interpretation",
        "max": "0"
      },
      {
        "id": "Observation.component.referenceRange",
        "path": "Observation.component.referenceRange",
        "max": "0"
      }
    ]
  }
}