{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://raw.githubusercontent.com/api-evangelist/jefferson-health/refs/heads/main/json-schema/jefferson-health-observation-schema.json",
  "title": "Jefferson Health FHIR R4 Observation (US Core Subset)",
  "description": "Subset JSON Schema for the US Core Observation profile as returned by the Jefferson Health (Epic) FHIR R4 endpoint.",
  "type": "object",
  "required": ["resourceType", "status", "code", "subject"],
  "properties": {
    "resourceType": { "type": "string", "const": "Observation" },
    "id": { "type": "string" },
    "status": {
      "type": "string",
      "enum": ["registered","preliminary","final","amended","corrected","cancelled","entered-in-error","unknown"]
    },
    "category": {
      "type": "array",
      "items": { "$ref": "#/$defs/CodeableConcept" }
    },
    "code": { "$ref": "#/$defs/CodeableConcept" },
    "subject": { "$ref": "#/$defs/Reference" },
    "effectiveDateTime": { "type": "string", "format": "date-time" },
    "valueQuantity": { "$ref": "#/$defs/Quantity" },
    "component": {
      "type": "array",
      "items": {
        "type": "object",
        "properties": {
          "code": { "$ref": "#/$defs/CodeableConcept" },
          "valueQuantity": { "$ref": "#/$defs/Quantity" }
        }
      }
    }
  },
  "$defs": {
    "CodeableConcept": {
      "type": "object",
      "properties": {
        "coding": {
          "type": "array",
          "items": {
            "type": "object",
            "properties": {
              "system": { "type": "string", "format": "uri" },
              "code": { "type": "string" },
              "display": { "type": "string" }
            }
          }
        },
        "text": { "type": "string" }
      }
    },
    "Reference": {
      "type": "object",
      "properties": {
        "reference": { "type": "string" },
        "display": { "type": "string" }
      }
    },
    "Quantity": {
      "type": "object",
      "properties": {
        "value": { "type": "number" },
        "unit": { "type": "string" },
        "system": { "type": "string", "format": "uri" },
        "code": { "type": "string" }
      }
    }
  }
}