# Provenance & third-party licensing

The micro-topics, the prerequisite graph, and all authored text in this project are original work, released under ODbL 1.0 + CC BY-SA 4.0 (see [README](README.md#license)).

**`data/curriculum-standards.json` is different.** Those standards reference external curriculum frameworks that this project does **not** own and **cannot** relicense. You can only receive the rights the upstream holders grant. Each source's terms — and exactly what we ship — are below.

## The "codes-only" distinction

For encumbered sources we ship only the **standard code** (e.g. `1-ESS1-1`) and its key — a short **factual identifier**, low copyright risk — and we **omit the verbatim standard text** (`description`, `clarificationStatement`, etc.). The topic→standard *links* in `topics.json` are unaffected, so "this topic maps to standard X" is preserved throughout. Sources marked `textIncluded: false` in `curriculum-standards.json` are codes-only.

## Per-source terms

### 🟢 `gxk-math-newcurriculum` — 《普通高中数学课程标准（2017年版2020年修订）》 — **自组织整理**
- **Publisher / rights:** 中华人民共和国教育部。
- **License:** 课标本身为公开的政府文件。本数据集的课标条目描述为**本数据集自撰**，未逐字复制课标原文。
- **We ship:** 自组织整理的课标条目摘要（非逐字原文），条目描述为本项目原创。

### 🟢 `gxk-chem-newcurriculum` — 《普通高中化学课程标准（2017年版2020年修订）》 — **自组织整理**
- **Publisher / rights:** 中华人民共和国教育部。
- **License:** 同上。条目描述为本数据集自撰。
- **We ship:** 自组织整理的课标条目摘要（非逐字原文）。

### 🟢 `gxk-phys-newcurriculum` — 《普通高中物理课程标准（2017年版2020年修订）》 — **自组织整理**
- **Publisher / rights:** 中华人民共和国教育部。
- **License:** 同上。条目描述为本数据集自撰。
- **We ship:** 自组织整理的课标条目摘要（非逐字原文）。

### 🟢 `gxk-eng-newcurriculum` — 《普通高中英语课程标准（2017年版2020年修订）》 — **自组织整理**
- **Publisher / rights:** 中华人民共和国教育部。
- **License:** 同上。条目描述为本数据集自撰。
- **We ship:** 自组织整理的课标条目摘要（非逐字原文）。

### 🟢 `gxk-chn-newcurriculum` — 《普通高中语文课程标准（2017年版2020年修订）》 — **自组织整理**
- **Publisher / rights:** 中华人民共和国教育部。
- **License:** 同上。条目描述为本数据集自撰。
- **We ship:** 自组织整理的课标条目摘要（非逐字原文）。

### 🟢 `gxk-bio-newcurriculum` — 《普通高中生物学课程标准（2017年版2020年修订）》 — **自组织整理**
- **Publisher / rights:** 中华人民共和国教育部。
- **License:** 同上。条目描述为本数据集自撰。
- **We ship:** 自组织整理的课标条目摘要（非逐字原文）。

### 🟢 `gxk-geo-newcurriculum` — 《普通高中地理课程标准（2017年版2020年修订）》 — **自组织整理**
- **Publisher / rights:** 中华人民共和国教育部。
- **License:** 同上。条目描述为本数据集自撰。
- **We ship:** 自组织整理的课标条目摘要（非逐字原文）。

### 🟢 `gxk-history-newcurriculum` — 《普通高中历史课程标准（2017年版2020年修订）》 — **自组织整理**
- **Publisher / rights:** 中华人民共和国教育部。
- **License:** 同上。条目描述为本数据集自撰。
- **We ship:** 自组织整理的课标条目摘要（非逐字原文）。

---

### 原项目上游来源（Marble 原数据集，已被本项目替换）

以下为原项目 [Marble Skill Taxonomy](https://github.com/withmarbleapp/os-taxonomy) 的来源声明，本 fork 不再使用这些数据，但保留以供参考：

<details>
<summary>原项目来源（点击展开）</summary>

### 🟢 `uk-nc-2013` — The National Curriculum in England (KS1–2) — **full text**
- **Publisher / rights:** UK Department for Education. © Crown copyright.
- **License:** [Open Government Licence v3.0](https://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/). Permits commercial use, adaptation, and redistribution. **No share-alike.**
- **Required notice:** *"Contains public sector information licensed under the Open Government Licence v3.0."*
- **We ship:** full standard text.

### 🟡 `ccss-ela`, `ccss-math` — Common Core State Standards — **full text**
- **Publisher / rights:** © 2010 National Governors Association Center for Best Practices (NGA Center) and Council of Chief State School Officers (CCSSO).
- **License:** the CCSS Public License grants *"a limited, non-exclusive, royalty-free license to copy, publish, distribute, and display the Common Core State Standards **for purposes that support the Common Core State Standards Initiative**."* This is **purpose-limited**, and it does **not** clearly grant derivative-work or sublicensing rights — so the CCSS-derived records remain under the CCSS Public License, **not** ODbL.
- **Required notice:** *"© Copyright 2010 National Governors Association Center for Best Practices and Council of Chief State School Officers."*
- **We ship:** full standard text, under the CCSS Public License.

### 🔴 `ngss-k5`, `ngss-ms` — Next Generation Science Standards — **codes only**
- **Publisher / rights:** copyright held by the National Academies Press. *"NGSS"* and *"Next Generation Science Standards"* are **registered trademarks of WestEd**.
- **License:** non-commercial entities may freely copy/adapt. **Commercial** entities may use the standards only with restrictions — including submitting samples for approval and a mandatory trademark disclaimer. Not relicensable under ODbL.
- **Required notice (if referencing NGSS):** *"NGSS is a registered trademark of WestEd. Neither WestEd nor the lead states and partners that developed the Next Generation Science Standards were involved in the production of this product, and do not endorse it."*
- **We ship:** codes/keys only (verbatim text omitted). To include full NGSS text, obtain WestEd clearance first.

### 🔴 `c3-social-studies` — C3 Framework for Social Studies — **codes only**
- **Publisher / rights:** © National Council for the Social Studies (NCSS).
- **License:** permission-based; redistribution of the framework text requires NCSS permission.
- **We ship:** codes/keys only. Obtain NCSS permission before shipping full text.

### 🔴 `ib-pyp-pspe` — IB PYP Personal, Social & Physical Education Scope & Sequence — **codes only**
- **Publisher / rights:** © International Baccalaureate Organization (IBO).
- **License:** IB content is copyrighted and IBO is protective of it; redistribution requires explicit IB permission. This is the most restrictive source.
- **We ship:** codes/keys only. Do not ship full text without IB permission.

</details>

## Changing what ships

The generation script can be modified to include or exclude specific sources' full text. To regenerate:

```bash
node scripts/generate-gaokao-all.mjs    # generate all 8 subjects
node scripts/validate.mjs               # validate referential integrity + checksums
```