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Background:

While writing an article on Wikipedia I needed to include text that is licensed under a CC-BY license. After a bit of digging I found that Wikipedia uses a CC BY-SA license.

Question:

Despite Wikipedia using a CC-BY-SA license, will I run into problems if I include CC-BY licensed text?

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Yes, you can merge information from CC-BY sources into a CC-BY-SA work (but not the other way). That is because CC-BY-SA still includes all conditions of CC-BY.

Note, as suggested by Martijn in the comments: It is still important to correctly attribute the changes to their respective author (as bot CC-BY and CC-BY-SA demand). Also Wikipedia can have it's own guidelines for using tests from different sources, that extend over what the license demands.

  • Note though that attribution must be retained, so for Wikipedia, you should use the edit summary to provide attribution as required by the author (usually with a link to the source) – Martijn Jun 27 '15 at 13:55
  • You're right, I edit that into my answer. – Mnementh Jun 28 '15 at 20:13

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