This work is licensed under a Creative Commons Attribution-ShareAlike 4.0 International License.
The Creative Commons license itself comes in several flavors, depending on how many of the rights normally included in “all rights reserved” you want to retain, and which ones you want to be more flexible on. Each of these licenses exist in three forms or layers: a full-on legal description, a user-friendly commons deed, and a machine readable version that talks to things like search engines. Most of the time CC is seen as a wide-open license to do anything, but it doesn’t have to be. Maybe rather than going from least restrictive to most, instead I’ll go from most restrictive (most like full-on copyright) to least. There are four basic elements: BY, SA, ND, NC, and they mix and match into six levels of licensing.
The most restrictive CC designation is CC SA NC ND. This specifies that people can use your work as long as they give you credit (attribution is part of all CC licenses), but it says they CANNOT sell the version they make for a profit and they CANNOT change your content in any way (that is, make no derivatives, no adaptations). This still means they can share your work freely, as long as they don’t sell it or change it. But this isn’t considered optimal for OER, because in addition to compiling anthologies, educators often expect to be able to adapt your content to contextualize it for their students. This license can also have a final added stipulation of share alike, meaning that any work that incorporated your content ought to be licensed under the exact same CC license. This isn’t on the CC organization’s matrix, but it prevents people from switching to a less restrictive license which might let the people who remix down the line to do something like sell the work for profit or adapt it.
NC SA is a little less restrictive, in that it does allow for adaptation. But it still prohibits sale for profit and requires the adaptations carry the same license.
NC, Non-commercial without Share Alike allows for adaptations and doesn’t protect against those adaptations being part of a commercial work.
No derivatives (ND) doesn’t allow for adaptation, but it does allow people to sell the work for a profit and it doesn’t require that the work they sell has a similar license on it.
Share alike alone DOES let someone sell an adaptation for a profit, but it has to retain a share alike license on it, so that might limit the market for such a work. I’m not sure I see the point of SA all by itself, other than to limit the market by undercutting anyone thinking they can somehow corner the market and monopolize distribution of a work.
The most open CC license is actually just CC BY. This allows a user to do anything with your content as long as they give you credit for creating it. All the other more restrictive licenses also include attribution – it’s just assumed in the rest. There’s an even more open condition if the work is in the public domain. Creative Commons calls that CC0, but it’s not technically a CC license.
All these CC licenses are ways of modifying copyright, so they apply where copyright law applies. That means NOT to things like patents, privacy restrictions, or moral claims. Exceptions and limitations to copyright like fair use also aren’t affected by CC licenses. But this can create complications if some work that begins as fair use finds its way into OER texts or coursework and now all of a sudden things like photos that may have been useable under fair use maybe aren’t any longer. So it’s important to understand the chain of custody, but I’ll say more about that another time.
Image from https://creativecommons.org/licenses/ CC BY-SA 4.0