{
  "$schema": "http://json-schema.org/draft-07/schema#",
  "type": "object",
  "properties": {
    "subject": {
      "type": "object",
      "properties": {
        "nhs_number": {
          "type": "string",
          "description": "NHS number of the subject"
        },
        "superseded_nhs_number": {
          "type": "string",
          "description": "Previous NHS number if superseded"
        },
        "gp_practice_code": {
          "type": "string",
          "description": "GP practice code"
        },
        "bso_organisation_code": {
          "type": "string",
          "description": "BSO organization code"
        },
        "next_test_due_date": {
          "type": "string",
          "format": "date-time",
          "description": "Date when next test is due"
        },
        "subject_status_code": {
          "type": "string",
          "description": "Status code of the subject"
        },
        "early_recall_date": {
          "type": "string",
          "format": "date-time",
          "description": "Early recall date if applicable"
        },
        "latest_invitation_date": {
          "type": "string",
          "format": "date-time",
          "description": "Date of the latest invitation"
        },
        "removal_reason": {
          "type": "string",
          "description": "Reason for removal if applicable"
        },
        "removal_date": {
          "type": "string",
          "format": "date-time",
          "description": "Date of removal if applicable"
        },
        "reason_for_ceasing_code": {
          "type": "string",
          "description": "Code indicating reason for ceasing"
        },
        "is_higher_risk": {
          "type": "boolean",
          "description": "Indicates if subject is higher risk"
        },
        "higher_risk_next_test_due_date": {
          "type": "string",
          "format": "date-time",
          "description": "Next test due date for higher risk subjects"
        },
        "higher_risk_recall_due_date": {
          "type": "string",
          "format": "date-time",
          "description": "Recall due date for higher risk subjects"
        },
        "higher_risk_active": {
          "type": "boolean",
          "description": "Indicates if higher risk status is active"
        },
        "gene_code": {
          "type": "string",
          "description": "Genetic code if applicable"
        },
        "risk_calculation_method": {
          "type": "string",
          "description": "Method used for risk calculation"
        },
        "preferred_language": {
          "type": "string",
          "description": "Preferred language for communication"
        }
      },
      "required": ["nhs_number"]
    },
    "episodes": {
      "type": "array",
      "items": {
        "type": "object",
        "properties": {
          "nhs_number": {
            "type": "string",
            "description": "NHS number linking to subject"
          },
          "episode_id": {
            "type": "string",
            "description": "Unique identifier for the episode"
          },
          "episode_type": {
            "type": "string",
            "description": "Type of episode"
          },
          "change_db_date": {
            "type": "string",
            "format": "date-time",
            "description": "Date of database change"
          },
          "episode_date": {
            "type": "string",
            "format": "date-time",
            "description": "Date of episode"
          },
          "appointment_date": {
            "type": "string",
            "format": "date-time",
            "description": "Date of appointment"
          },
          "date_of_foa": {
            "type": "string",
            "format": "date-time",
            "description": "Date of first offer of appointment"
          },
          "date_of_as": {
            "type": "string",
            "format": "date-time",
            "description": "Date of assessment"
          },
          "early_recall": {
            "type": "boolean",
            "description": "Indicates if early recall is needed"
          },
          "call_recall_s": {
            "type": "string",
            "description": "Call/recall status"
          },
          "end_code": {
            "type": "string",
            "description": "End code for episode"
          },
          "la_bso_organisation": {
            "type": "string",
            "description": "LA/BSO organization code"
          },
          "bso_batch": {
            "type": "string",
            "description": "BSO batch identifier"
          },
          "reason_close": {
            "type": "string",
            "description": "Reason for closing episode"
          },
          "end_point": {
            "type": "string",
            "description": "End point of episode"
          },
          "final_action": {
            "type": "string",
            "description": "Final action taken"
          }
        },
        "required": ["nhs_number", "episode_id"]
      }
    }
  },
  "required": ["subject", "episodes"]
}