# Licensing

These terms apply to original material by Lukas C. Bossert in this repository,
including its published HTML/PDF guides and downloadable packages.
The two licenses cover different parts of the project.

## Content — CC0 1.0 Universal

Tutorial prose, documentation text, individual example code, input fixtures,
example results, plots, illustrations and repository artwork are dedicated to
the public domain under [CC0 1.0 Universal](https://creativecommons.org/publicdomain/zero/1.0/).
You may reuse this content without attribution. Full legal text:
[LICENSES/CC0-1.0.txt](LICENSES/CC0-1.0.txt).

## Structure — CC BY 4.0 International

The original, copyrightable selection and arrangement of the tours, page design,
layouts, templates and the publishing/build framework implementation are licensed
under [Creative Commons Attribution 4.0 International](https://creativecommons.org/licenses/by/4.0/).
This includes publisher, rendering, navigation and build code; tutorial example
code remains CC0. Copyright in this structural material: Lukas C. Bossert.
Full legal text: [LICENSES/CC-BY-4.0.txt](LICENSES/CC-BY-4.0.txt).

When sharing this structural material or adaptations, give appropriate credit,
retain supplied notices, link to CC BY 4.0 and the source where reasonably
practicable, and indicate changes. A suitable credit is:

> Tour guides structure and publishing framework by Lukas C. Bossert,
> licensed under CC BY 4.0. Source: https://codeberg.org/lukascbossert/tourguides.
> Changes: describe your changes, if any.

Abstract ideas, methods and facts are not subject to these copyright conditions.
Credit for inspiration from the tour concept is appreciated as a courtesy.
See [Creative Commons' explanation of ideas and database structure](https://creativecommons.org/faq/#what-components-of-a-database-are-protected-by-copyright).

## Third-party material

Existing third-party material, fonts, dependencies, quoted material and their
license/attribution notices retain their respective terms. The terms above apply
only to rights held by Lukas C. Bossert; they do not relicense third-party work.
Both Creative Commons legal tools include their own warranty disclaimers.

## BKG VG250 boundary data

The German Länder inputs and their geographic linework retain
[dl-de/by-2-0](https://www.govdata.de/dl-de/by-2-0), attributed to
[BKG](https://www.bkg.bund.de) 2026. They are excluded from the CC0 dedication
of original tutorial material. See [the BKG source and changes notice](LICENSES/BKG-VG250-NOTICE.md)
and the original terms and data-source list in LICENSES/.