On Fri, Oct 9, 2015 at 9:19 AM, Dima Pasechnik <dimp...@gmail.com> wrote: > > > On Friday, 9 October 2015 07:44:55 UTC-7, Volker Braun wrote: >> >> Looks great; The two restrictions >> >> * * You must not remove this section of the text, containing author >> * >> * attribution, copyright notice, and legal disclaimer. >> * >> * * You must clearly mark modified versions of this software >> * >> * as differing from the original. >> * >> >> are explicitly allowed by GPLv3 section 7: >> >> b) Requiring preservation of specified reasonable legal notices or author >> attributions in that material or in the Appropriate Legal Notices displayed >> by works containing it; or >> c) Prohibiting misrepresentation of the origin of that material, or >> requiring that modified versions of such material be marked in reasonable >> ways as different from the original version; or >> >> > well, we rather talk about having the following copyright: > > nauty is copyright (1984-2013) Brendan McKay. Traces is copyright > (2008-2013) Adolfo Piperno. All rights reserved. You must not remove this > copyright notice, and you must document any changes that you make to this > program. This software is subject to this copyright only, irrespective of > any copyright attached to any package of which this is a part.
Unfortunately this license doesn't even grant permission to use the software. For example, the BSD license starts: "Redistribution and use in source and binary forms are permitted ...". By default, without an explicit *grant* of rights, all rights are reserved. In fact, the copyright notice above very explicitly states that "all rights reserved", which means: "It indicates that the copyright holder reserves, or holds for their own use, all the rights provided by copyright law." I hope you can convince Brendan to pick a standard license, or just guide him into choosing BSD 2-clause: https://opensource.org/licenses/BSD-2-Clause It's basically what he wants, except for "you must document any changes that you make". I still have absolutely no idea what that statement is supposed to mean. However, it's either trivial (due to revision control), so should not be included, or it actually means something, so it is GPL incompatible. During the first few years of Sage I got around 10 projects to change their licenses. I never ever considered having any of them make up a new license. That's a difficult path, since it is copyright law and we are not lawyers. -- William -- William (http://wstein.org) -- You received this message because you are subscribed to the Google Groups "sage-devel" group. To unsubscribe from this group and stop receiving emails from it, send an email to sage-devel+unsubscr...@googlegroups.com. To post to this group, send email to sage-devel@googlegroups.com. Visit this group at http://groups.google.com/group/sage-devel. For more options, visit https://groups.google.com/d/optout.
