[License-discuss] Strong and weak copyleft

ChanMaxthon xcvista at me.com
Fri Apr 10 13:54:23 UTC 2015


If memories serve me right Apache License is permissive with patent grantings and CC0 is public domain with a permissive fallback for situations where PD is not allowed.

Sent from my iPhone

> On Apr 10, 2015, at 21:03, Jim Jagielski <jim at jimjag.com> wrote:
> 
> 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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