FHIR IG Statistics: StructureDefinition/corhealth-observation

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{
  "resourceType": "StructureDefinition",
  "id": "corhealth-observation",
  "url": "https://corhealth-ontario.ca/fhir/StructureDefinition/corhealth-observation",
  "name": "CorHealthObservation",
  "title": "CorHealth Base Observation",
  "status": "active",
  "description": "CorHealth Base Observation",
  "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",
        "constraint": [
          {
            "key": "corhealth-obs-1",
            "severity": "error",
            "human": "Observation.value or Observation.dataAbsentReason SHALL be present",
            "expression": "value.exists() or dataAbsentReason.exists()",
            "source": "https://corhealth-ontario.ca/fhir/StructureDefinition/corhealth-observation"
          }
        ]
      },
      {
        "id": "Observation.identifier.system",
        "path": "Observation.identifier.system",
        "min": 1,
        "patternUri": "https://corhealth-ontario.ca/fhir/NamingSystem/observation-order-id"
      },
      {
        "id": "Observation.identifier.value",
        "path": "Observation.identifier.value",
        "min": 1
      },
      {
        "id": "Observation.status",
        "path": "Observation.status",
        "patternCode": "final"
      },
      {
        "id": "Observation.code",
        "path": "Observation.code",
        "binding": {
          "strength": "required",
          "valueSet": "https://corhealth-ontario.ca/fhir/ValueSet/CorHealthDataElementObservationVS"
        }
      },
      {
        "id": "Observation.subject",
        "path": "Observation.subject",
        "min": 1,
        "type": [
          {
            "code": "Reference",
            "targetProfile": [
              "https://corhealth-ontario.ca/fhir/StructureDefinition/corhealth-patient"
            ]
          }
        ],
        "mustSupport": true
      },
      {
        "id": "Observation.value[x]",
        "path": "Observation.value[x]",
        "mustSupport": true
      },
      {
        "id": "Observation.dataAbsentReason",
        "path": "Observation.dataAbsentReason",
        "mustSupport": true,
        "binding": {
          "strength": "required",
          "valueSet": "https://corhealth-ontario.ca/fhir/ValueSet/CorHealthDataAbsentReasonVS"
        }
      }
    ]
  }
}