[Zope] ZPL and GPL: What should one consider when choosing a license?

Chris McDonough chrism at plope.com
Fri Dec 21 16:12:54 EST 2007

On Dec 21, 2007, at 3:53 PM, Ross Patterson wrote:
> Unfortunately, the comment by Chris McDonough mentioned in the latter
> doesn't seem to be accessible any more.  I'd love to read it.

It said:

I don't think Plone is "bad" because it uses the GPL. I do think it's  
a pain in the balls to have to ask authors of various GPL things if  
they're willing to relicense ZPL or other BSD-type license in order to  
be able to incorporate their software into CMF or Zope (as required by  
the ZC contributor's agreement in order to check it into either of  
those projects). It just puts up a big enough impediment to sharing  
code that the codebases don't intermingle much.
What's gauche about using the GPL is that at least by default, the  
Plone guys don't need to ask the Zope guys if they can ship their  
software. They get the benefit (or pain ;-) of shipping it all without  
any extra work. But the Zope guys need to go track down the copyright  
owners of various bits of Plone code and get all of their permissions  
to ship their software in CMF or Zope via a relicense. That's just  
hurts collaboration badly. It's anti-sharing which I think is  
practically just gauche.


Now I've gotta run out of here before a licensing discussion breaks  
out. ;-)

- C

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