# Licensing notice

RuEn Code Curriculum is a multi-source collection. No single license overrides the licenses attached to individual records or their upstream sources.

Every Parquet row includes a `license` field. Code-derived rows additionally retain repository/path provenance where available. Users must comply with the license recorded for each item and with any upstream notice or attribution obligation.

## License families represented

- Apache License 2.0
- MIT License
- BSD 2-Clause License
- BSD 3-Clause License
- ISC License
- CC0 1.0 Universal
- The Unlicense
- Creative Commons Attribution-ShareAlike 3.0
- GNU Free Documentation License for applicable Wikipedia material
- Project-authored records, released for use and redistribution as part of this dataset

Canonical license references:

- Apache-2.0: https://www.apache.org/licenses/LICENSE-2.0
- MIT: https://opensource.org/license/mit
- BSD-2-Clause: https://opensource.org/license/bsd-2-clause
- BSD-3-Clause: https://opensource.org/license/bsd-3-clause
- ISC: https://opensource.org/license/isc-license-txt
- CC0-1.0: https://creativecommons.org/publicdomain/zero/1.0/
- Unlicense: https://unlicense.org/
- CC-BY-SA-3.0: https://creativecommons.org/licenses/by-sa/3.0/
- GFDL: https://www.gnu.org/licenses/fdl-1.3.html

Dataset-wrapper licenses do not necessarily replace the rights or obligations attached to upstream content. In particular, WikiOmnia's Apache-2.0 wrapper does not replace the CC-BY-SA obligations of its Wikipedia-derived content.

This file is an engineering summary, not legal advice or a warranty of non-infringement. If a record-level field and this summary differ, treat the more specific record/upstream terms as authoritative.