[License-discuss] Strong and weak copyleft

[Jim Jagielski]

I would even question whether Apache and CCO are
really "copyleft" in any way... :)

> On Apr 9, 2015, at 4:35 PM, Lawrence Rosen <lrosen at rosenlaw.com> wrote:
> 
> Maybe we can summarize so far:
> 
> ULTRA-STRONG		(AGPL)
> STRONG		(GPL)
> MORE THAN WEAK	(LGPL)
> ALMOST WEAK		(EPL)
> WEAK			(MPL)
> VERY WEAK		(APACHE)
> ULTRA-WEAK		(CC0)
> 
> This rather simple scale is not reflected in copyright law or any relevant
> cases. It is not part of the Free Software Guidelines or the Open Source
> Definition. It bears no resemblance whatsoever to the definition of
> "derivative work." It is based here in this thread on obscure quotes from
> various websites or opinions about "license author's intent" without quoting
> the actual provisions of the licenses that enable these vague distinctions. 
> 
> This is one of the issues raised by the VMware complaint in Germany, and
> we're expecting a court to make a decision about how strong the GPL is. This
> email thread is still not very helpful. 
> 
> /Larry
> 
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