Re: [OpenGuides-Dev] Creative Commons wiki licence in draft

On Fri, Mar 18, 2005 at 10:43:33AM +0000, Rev Simon Rumble wrote:

But how do you relicense existing material?

You get the permission of the copyright holders.

In the case if this licence, if it's made sufficiently close to by-sa I think you could argue that the change was functionally equivalent to the existing setup.

In fact, we did change the OG licence (from "undefined" to by-sa). The best we could do was to place a notice on the home page to invite contributors to contact us if they did not wish their work to be relicensed. It is somewhat dubious, but we decided it was the best thing to do under the circumstances, and I'm confident that I've personally told most of the serious contributors (though who have submitted copyrightable work).