{
  "schema_version": 1,
  "status": "not-verified",
  "claim": "",
  "source_type": "unclassified",
  "source_reference": "",
  "measurement_window": {"start": null, "end": null, "timezone": null},
  "sample": {"size": null, "unit": null, "selection_method": null},
  "metric": {"definition": "", "numerator": null, "denominator": null, "unit": ""},
  "baseline": null,
  "measurement_method": "",
  "raw_data_reference": null,
  "reproduction_instructions": "",
  "customer_publication_permission": "not-documented",
  "independent_verification": {"status": "not-documented", "reference": null},
  "limitations": [],
  "reviewed_at": null,
  "reviewer": null,
  "instructions": {
    "cn": "空值表示未知，不表示零。没有可核验证据时不要改为已验证；不要上传客户个人数据、凭证或未经授权的日志。",
    "en": "Null means unknown, not zero. Do not mark verified without reviewable evidence. Do not publish personal customer data, credentials or unauthorized logs."
  }
}