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cc-licenses - Re: [cc-licenses] [Foundation-l] Requirements for a strong copyleft license

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Subject: Development of Creative Commons licenses

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  • From: Platonides <Platonides AT gmail.com>
  • To: cc-licenses AT lists.ibiblio.org
  • Cc: commons-l AT lists.wikimedia.org
  • Subject: Re: [cc-licenses] [Foundation-l] Requirements for a strong copyleft license
  • Date: Wed, 05 Dec 2007 22:32:51 +0100

Daniel Kinzler wrote:
Brianna Laugher wrote:
[...]
After rereading the CC-BY legal code it does appear you (and others
who made this point) are correct, and I was quite mistaken about the
strength of the CC-BY license.
http://creativecommons.org/licenses/by/3.0/legalcode
"You may Distribute or Publicly Perform the Work only under the terms
of this License."

Indeed it seems CC-BY is already the "weak copyleft" I was thinking
CC-BY-SA is... CC-BY is much stronger than I realised. I thought CC-BY
just meant "include a byline with my name".

No it isn't, there is one important difference: derivative work, i.e. modified
versions. Again, compare to the LGPL: modified versions must be distributed
under the same license (though larger works which use/incorporate clearly
demarked LGPL components do not). This is not true for CC-BY: if i make a
derivative of a CC-BY work, I have to attribute the author, but i can license
my
version under whatever conditions i like. That's not weak copyleft, that's no
copyleft at all.

I like that concaption. However, as simple it is to differenciate when it's a text/image issue, what happens when the modified version is also an image, but breader. Eg. the virgin case. Is that a composition of your photo with the text and background (it would have been composed in layers) or simply a derivative work?

The LGPL doesn't either define the difference.


Daniel Kinzler wrote:
something like "CC-BY-SA/commons-mod".
Don't call it so. People would start confusing it with Cc-by-sa. Maybe CC-BY-LSA (Less Share-Alike) following LGPL sample?





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