FYI: New revision of the Zope Public License

Gregor Hoffleit gregor at
Wed Nov 21 16:12:58 UTC 2001

* Paul Everitt <paul at> [011121 16:41]:
> Hello to all.  We at Zope Corporation have finished a final draft of a 
> major update to the Zope Public License:
> This license was derived from the previous ZPL 1.0 (and 1.1) license, 
> which received an OSI stamp of approval almost two years ago, before the 
> OSI started this more official process.  The original ZPL was very close 
> in spirit to the Apache license.
> The major goal of the license change has been to become GPL compatible. 
>  Thanks to the work and cooperation between Hadar Pedhazur (our board 
> chairman) and Richard Stallman, we're pleased to say that Richard has 
> certified this license text as being GPL compatible.
> Please feel free to mention any of the names discussed herein (my name, 
> Hadar's name, Zope Corporation, etc.) on the license-discuss mailing 
> list.  However, please make sure that any replies to us cc the 
> zope-license at mailing list.  (This is a private alias shared by 
> Hadar and me.)
> Thanks, and look forward to hearing from you!

I don't believe this. This is the most clean license I saw from any
corporation. In fact, this is a vebose copy of the new-style BSD license
(without advertising clause), with two additional requirements:

	4. The right to distribute this software or to use it for any
           purpose does not give you the right to use Servicemarks
	   (sm) or Trademarks (tm) of Zope Corporation. Use of them is
	   covered in a separate agreement (see

	5. If any files are modified, you must cause the modified
	   files to carry prominent notices stating that you changed
	   the files and the date of any change.

AFAICS, (5.) is completely fine with the DFSG/OSD.

To me, (4.) seems to be a superfluous elaboration, not a restriction. By
the way, Paul, doesn't yet exist.

Congratulations, Paul and Hadar, to this license! 

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