> 
> The FSF page says this in regards to the ZPL:
> 
> [snip]
> > We urge you not to use the license of Zope for software you write.
> However,
> > there is no reason to avoid running programs that have been released under
> > this license, such as Zope.
> 
> So what is the issue you are raising? Any software you write on or for Zope
> can be licensed in any manner you choose. Stallman et al may not "approve"
> of the ZPL mostly I think because it has more in common with the BSD license
> than the GPL, in that binary distribution of Zope is allowed without the
> source code.
> 
> 

As Lalo Martins has pointed out the problem is with the fourth clause of
the ZPL, which rms calls "the obnoxious advertising clause". That clause
makes the ZPL GPL-Incompatible, it's illegal to distribute GPL code together
with GPL-Incompatible code, that's what stopped Debian to distribute KDE.
Because of this I've decided to use LGPL instead of GPL for my zope
software, but I know there's people that don't use Zope because of this
incompatibility.


regards,
jdavid

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