# Copyright and license scope

Copyright © 2026 Philip Engel. All rights reserved except where a license is
expressly granted below.

The source code of Threefold Explorer is licensed under the MIT License in
[LICENSE-CODE.txt](LICENSE-CODE.txt).

The public explanatory documentation is licensed under Creative Commons
Attribution 4.0 International as described in
[LICENSE-DOCUMENTATION.md](LICENSE-DOCUMENTATION.md).

The following material is excluded from both licenses and remains all rights
reserved:

- the tabulated local-model data in `api/engine/local_model_database/`;
- the compressed copy `api/engine/local_model_database.tar.gz`; and
- unpublished derivations, geometric certifications, and supporting
  mathematical material for those models, whether or not referred to by the
  public documentation.

The Python and Sage code that reads, validates, and uses the database remains
covered by the MIT License. No license to the excluded mathematical data is
granted merely because it is distributed with or accessed by the program.