- COPYING.GPLv2: GNU General Public License version 2
- COPYING.GPLv3: GNU General Public License version 3
- A note about old XZ Utils releases:
-
- XZ Utils releases 5.4.6 and older and 5.5.1alpha have a
- significant amount of code put into the public domain and
- that obviously remains so. The switch from public domain to
- 0BSD for newer releases was made in Febrary 2024 because
- public domain has (real or perceived) legal ambiguities in
- some jurisdictions.
-
- There is very little *practical* difference between public
- domain and 0BSD. The main difference likely is that one
- shouldn't claim that 0BSD-licensed code is in the public
- domain; 0BSD-licensed code is copyrighted but available under
- an extremely permissive license. Neither 0BSD nor public domain
- require retaining or reproducing author, copyright holder, or
- license notices when distributing the software. (Compare to,
- for example, BSD 2-Clause "Simplified" License which does have
- such requirements.)
-
If you have questions, don't hesitate to ask for more information.
The contact information is in the README file.