[cc-licenses] Can a by-NC-sa use material from a by-sa? Seems no

Terry Hancock hancock at anansispaceworks.com
Wed May 3 03:00:17 EDT 2006

robinp at xtra.co.nz wrote:

>Thank you, Mia. Spot-on. Clearly by-sa is one of the five licenses that is incompatible with all others.
>But I wonder why material available for commercial use should not be copied to a place where it isn't.
>Never mind - I'll pass the info on to the owner who is thinking of adopting by-nc-sa. Perhaps he will have second thoughts. I've seen opinions that suggest "NC" has problems.
Because if you re-release a work from By-SA to By-NC-SA, you would not
be "sharing alike".   You'd be violating the copyleft to release the work
under a more restrictive license.

It's exactly the same reason  you can't appropriate a copyleft work and
release it under a full proprietary "all rights reserved" license.

Mind you, you can distribute the two works together, as long as they aren't
combined into one work (i.e. they remain separable).


Terry Hancock (hancock at AnansiSpaceworks.com)
Anansi Spaceworks http://www.AnansiSpaceworks.com

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