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diff --git a/LICENSE.md b/LICENSE.md new file mode 100644 index 0000000..337f134 --- /dev/null +++ b/LICENSE.md @@ -0,0 +1,61 @@ +# License and Legal Information + +The **SAME Analog Modular Ecosystem** is an open-hardware specification and +computing platform. To properly protect hardware designs, documentation, and +executable software tooling, this repository utilizes a multi-scope open +licensing model: + +* **Documentation & Prose:** Creative Commons Attribution-ShareAlike 4.0 + International (`CC-BY-SA-4.0`) +* **Hardware Designs & CAD:** CERN Open Hardware Licence Version 2 - Strongly + Reciprocal (`CERN-OHL-S-2.0+`) +* **Executable Code & Tooling:** GNU General Public License v3.0 or later + (`GPL-3.0-or-later`) + +## 1. Documentation and Specification + +All prose, mathematical derivations, tables, rendered figures, and specification +text contained within this repository are licensed under the **Creative Commons +Attribution-ShareAlike 4.0 International License**. + +* **SPDX-License-Identifier:** `CC-BY-SA-4.0` +* **Full Text:** See [`LICENSES/CC-BY-SA-4.0.txt`](LICENSES/CC-BY-SA-4.0.txt) + or visit [creativecommons.org/licenses/by-sa/4.0](https://creativecommons.org/licenses/by-sa/4.0/). + +> **Note on Future Versions:** If a later version of CC BY-SA is published by +Creative Commons, you may distribute the documentation under that later version +as well. + +## 2. Hardware Designs + +All hardware files—including electronic schematics, PCB stackups, layout files, +Gerber files, `cetz`/`zap` mechanical drawings, 3D CAD/STEP models, and chassis and +cassette enclosure definitions are licensed under the **CERN Open Hardware +Licence Version 2 - Strongly Reciprocal**. + +* **SPDX-License-Identifier:** `CERN-OHL-S-2.0+` +* **Full Text:** See + [`LICENSES/CERN-OHL-S-2.0+.txt`](LICENSES/CERN-OHL-S-2.0+.txt) or visit + [ohwr.org/cernohl](https://ohwr.org/cernohl). + +## 3. Executable Code, Scripts, and Verification Tooling + +All executable source code—including the Typst metrology library (`lib/*`), +currying wrappers (`lib/unify.typ`), unit test helper functions +(`lib/assert-aeq.typ`, `lib/apply-prefix.typ`), compile-time assertions, build +scripts, and simulation harnesses are licensed under the **GNU General Public +License v3.0 or later**. + +* **SPDX-License-Identifier:** `GPL-3.0-or-later` +* **Full Text:** See + [`LICENSES/GPL-3.0-or-later.txt`](LICENSES/GPL-3.0-or-later.txt) or visit + [gnu.org/licenses/gpl-3.0.html](https://www.gnu.org/licenses/gpl-3.0.html). + +## Summary of SPDX Identifiers + +```spdx +SPDX-FileCopyrightText: 2026 Denis Chevalier <perso@denischevalier.fr> +SPDX-License-Identifier: CC-BY-SA-4.0 +SPDX-License-Identifier: CERN-OHL-S-2.0+ +SPDX-License-Identifier: GPL-3.0-or-later +``` |