Hi folks,

Nathann Cohen recently [1] brought up the topic of using the ISGCI
graph database [2] in Sage. During several weeks of email
communication, we have reached agreement with upstream developers of
ISGCI to have the database licensed under the CC terms below. Under
such terms, Nathann and I would like to know if the database could be
distributed as part of Sage. I know that several databases are
distributed with Sage, but I'm not sure of the licensing terms
governing those databases. A database is different from source code,
so it needs another type of license. This might be a non-issue because
the Sage standard documentation is licensed under a slightly different
CC license. I would like to request comments to see whether ISGCI
could be distributed as part of Sage with the licensing terms below.

On Sat, May 29, 2010 at 9:46 PM, Ernst de Ridder <[email protected]> wrote:
> Hi all,
>
> first of all my apologies for taking so long in answering. The problem
> I'm having with open source licenses, is that the database isn't code
> but data. So I looked around for "open data" and found the creative
> commons licenses. This led me to the following license:
>
> The ISGCI database is licensed under the Creative Commons
> Attribution-Share
> Alike 3.0 Unported License. To view a copy of this license, visit
> http://creativecommons.org/licenses/by-sa/3.0/ or send a letter to
> Creative
> Commons, 171 Second Street, Suite 300, San Francisco, California, 94105,
> USA.
> Attributions should refer to ISGCI (Information System on Graph Classes
> and
> their Inclusions) by H.N. de Ridder et al. and contain the active URL,
> currently http://wwwteo.informatik.uni-rostock.de/isgci
>
> Will this one work for you?
>
> Best regards,
>   Ernst

[1] 
http://groups.google.com/group/sage-devel/browse_thread/thread/374e5af70fd4ac80/

[2] http://wwwteo.informatik.uni-rostock.de/isgci/

-- 
Regards
Minh Van Nguyen

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