本插件采用双许可，与上游数据仓库
https://github.com/qiuyiwu1989-star/k12-knowledge-substrate 保持一致：

- **代码**（src/ 与 scripts/）：MIT

- **随包分发的数据快照**（data/substrate.json —— 结构、ID、关系、清单）：
  Open Database License (ODbL) v1.0
  全文见 https://opendatacommons.org/licenses/odbl/1-0/

- **数据中本项目撰写的文本**（statement / assessment / evidence / reason）：
  CC BY-SA 4.0
  全文见 https://creativecommons.org/licenses/by-sa/4.0/

- **课标原文**：不随本插件分发，权利归中华人民共和国教育部。
  溯源见上游仓库 PROVENANCE.md

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