Re: [libreplanet-discuss] Potential of the Sleepycat License

[Aaron Wolf]

On 04/16/2017 08:32 PM, Michael Pagan wrote:

> the work must be under the same license as the original work, too.

To be picky and pedantic, what matters for copyleft is merely that the
freedoms may not be stripped away. It doesn't matter whether derivatives
have the exact same license, that's just the normal mechanism for
copyleft. GPLv3 code allows use in AGPLv3 and that's not strictly the
same license. If it is ever released, copyleft-next might be a license
that retains copyleft by specifying derivatives to use either the same
*or* AGPL…

What defines copyleft is that stripping away freedoms is itself
copyright violation. Any mechanism achieving that result is copyleft.

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