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Add NOTICE, and fix CC BY-SA 4.0 ambiguity #115

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Add NOTICE, and fix CC BY-SA 4.0 ambiguity #115

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18 changes: 14 additions & 4 deletions LICENSE
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Apache License
Version 2.0, January 2004
https://www.apache.org/licenses/
http://www.apache.org/licenses/

TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION

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END OF TERMS AND CONDITIONS

Copyright 2019, 2020 OCI Contributors
Copyright 2016 Docker, Inc.
APPENDIX: How to apply the Apache License to your work.

To apply the Apache License to your work, attach the following
boilerplate notice, with the fields enclosed by brackets "[]"
replaced with your own identifying information. (Don't include
the brackets!) The text should be enclosed in the appropriate
comment syntax for the file format. We also recommend that a
file or class name and description of purpose be included on the
same "printed page" as the copyright notice for easier
identification within third-party archives.

Copyright [yyyy] [name of copyright owner]

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

https://www.apache.org/licenses/LICENSE-2.0
http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
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12 changes: 12 additions & 0 deletions NOTICE
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opencontainers/go-digest

Copyright The OCI Contributors.
Copyright 2016 Docker, Inc.

Source code is licensed under the Apache License, Version 2.0.
See LICENSE for details.

Documentation files, including README.md and CONTRIBUTING.md,
are licensed under the Creative Commons Attribution-ShareAlike
4.0 International License (CC BY-SA 4.0). See LICENSE.docs
for details.
2 changes: 1 addition & 1 deletion README.md
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Expand Up @@ -92,7 +92,7 @@ Copyright © 2019, 2020 OCI Contributors
Copyright © 2016 Docker, Inc.
All rights reserved, except as follows.
Code is released under the [Apache 2.0 license](LICENSE).
This `README.md` file and the [`CONTRIBUTING.md`](CONTRIBUTING.md) file are licensed under the Creative Commons Attribution 4.0 International License under the terms and conditions set forth in the file [`LICENSE.docs`](LICENSE.docs).
This `README.md` file and the [`CONTRIBUTING.md`](CONTRIBUTING.md) file are licensed under the Creative Commons Attribution-ShareAlike 4.0 International License under the terms and conditions set forth in the file [`LICENSE.docs`](LICENSE.docs).

@thaJeztah thaJeztah May 15, 2026

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This is the tricky part because of the ambiguity that was there; the original test described it without ShareAlike, but then used CC BY-SA further on; fcf056d

This README.md file and the CONTRIBUTING.md file are licensed under the Creative Commons Attribution 4.0 International License under the terms and conditions set forth in the file LICENSE.docs. You may obtain a duplicate copy of the same license, titled CC BY-SA 4.0, at http://creativecommons.org/licenses/by-sa/4.0/.

Given that the license itself is ShareAlike and referred to as CC BY-SA (as well as linked), I guess that's the most correct way to fix the ambiguity.

They're quite different though in some ways;

  • CC BY-SA requires modified versions to keep using the same license (“share alike”).
  • Plain CC BY only requires attribution and allows relicensing derivatives under different terms.

@thaJeztah thaJeztah May 15, 2026

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Honestly, I wonder if it's worth the complexity to have these two files under a separate license, and if it would make more sense to just put them under the Apache-2 license.

@AkihiroSuda AkihiroSuda Jun 15, 2026

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just put them under the Apache-2 license.

👍

You may obtain a duplicate copy of the same license, titled CC BY-SA 4.0, at http://creativecommons.org/licenses/by-sa/4.0/.

[security]: https://github.com/opencontainers/org/blob/master/security
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