# Licence

The content of this repository — the skills graph (`skills/skills.ttl`), the knobit registers
(`skills/knobits/`, including the K-12 curriculum registers in `skills/knobits/k12/`), `skills/mapping.yaml`,
the IRI map (`skills/iri-map.csv`) and the documentation — is licensed under the
**Creative Commons Attribution 4.0 International licence (CC BY 4.0)**:
https://creativecommons.org/licenses/by/4.0/

Copyright © 2026 Peep Küngas.

You may share and adapt it for any purpose, including commercially, as long as you give appropriate credit,
link to the licence and say whether you changed it. Suggested attribution:

> Knobit ontology by Peep Küngas, https://knobit.org, licensed under CC BY 4.0.

The same content is published at https://knobit.org, where every resource's IRI resolves.

## Third-party parts

- **The metamodel** (`metamodel/`, namespace `https://knobit.org/def/`) is derived from the EstCORE 2 education
  ontology (`https://schema.edu.ee/`) from [`hitsa/estcore2`](https://github.com/hitsa/estcore2), copyright © 2020 Hariduse Infotehnoloogia SA
  (HITSA), licensed under CC BY 4.0; the LCG knobit-profile terms added to it are © 2026 Peep Küngas,
  CC BY 4.0. Changes: the terms were moved to the namespace `https://knobit.org/def/` (2026-11-02;
  `metamodel/estcore2-alignment.ttl` links each to its EstCORE 2 original) and are listed in `metamodel/README.md`.
- **Texts quoted from Estonian legislation** in the K-12 registers (the national curricula, published in
  Riigi Teataja) are official texts, which are not protected by copyright in Estonia (Autoriõiguse seadus § 5).
- **DAMA-DMBOK2** is cited by reference only; the registers describe competences in their own words and do
  not reproduce the book.

The software in this repository (the Python scripts) is provided under the same terms unless a file says
otherwise.