{
  "$schema": "http://json-schema.org/draft-07/schema#",
  "title": "user_summary",
  "description": "利用者個別情報ではなく、加算判定に必要な集計値（PII 非含有）。CPOS の analysis-source の userSummary もこれに準拠する。",
  "type": "object",
  "required": ["_meta", "summary"],
  "properties": {
    "_meta": {
      "type": "object",
      "required": ["schema", "office_code", "tenant_id"],
      "properties": {
        "schema": { "const": "user_summary" },
        "schema_version": { "type": "string" },
        "office_code": { "type": "string" },
        "tenant_id": { "type": "string" },
        "updated": { "type": "string", "format": "date-time" },
        "anonymization_status": {
          "type": "string",
          "enum": ["aggregated"],
          "description": "集計済みであること（個人特定不能）を明示"
        },
        "data_source_type": {
          "type": "string",
          "enum": ["manual", "cpos_aggregate", "demo_aggregate", "local_aggregate"]
        }
      }
    },
    "summary": {
      "type": "object",
      "required": ["total_users"],
      "properties": {
        "total_users": { "type": "integer", "minimum": 0 },
        "care_level_distribution": {
          "type": "object",
          "description": "要介護度別の人数（キーは youshien_1, youkaigo_1〜5 など）",
          "additionalProperties": { "type": "integer", "minimum": 0 }
        },
        "yokaigo_3plus_ratio": { "type": ["number", "null"], "minimum": 0, "maximum": 1 },
        "ninchi_jiritsudo_distribution": { "type": "object" },
        "severe_user_count": { "type": "integer", "minimum": 0 },
        "severe_user_ratio": { "type": ["number", "null"], "minimum": 0, "maximum": 1 }
      }
    }
  }
}