Problems of using (non textual) Creative Commons-Licensed works for building upon them
»One goal of Creative Commons is to increase the amount of openly licensed creativity in “the commons” — the body of work freely available for legal use, sharing, repurposing, and remixing.« https://creativecommons.org/use-remix/ (on 4th of December 2016)
There are major successful projects like Wikipedia which use a CC …
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