The text throughout this guide serves as a guideline and is not intended as legal advice. If you have a specific legal question pertaining to copyright law, you should contact the Office of Legal Affairs.
Many open resources are licensed under a Creative Commons license. These licenses are sets of permissions that make it easy for users to determine what they are allow to do with the work. Creative Commons licenses give content creators a “standardized way to grant the public permission to use their creative work under copyright law.”1
There are four main elements or attributes that can be indicated in a Creative Commons license:
BY - Attribution: Others can copy, distribute, display, perform, and remix the work as long as they credit the original creator.
SA - Share Alike: Derivatives (e.g. adaptations, revisions, remixes, etc.) of the original work must be shared under the same license as the original.
NC - Noncommercial: Others can copy, distribute, display, perform, and remix the work for noncommercial purposes only (i.e. they can't make money).
ND - No Derivatives: Others can copy, distribute, display, or perform the work, but remixes, adaptations, revisions, etc., are not allowed.
These four elements can be combined into the six main types of Creative Commons licenses:
CC-BY (Attribution)
CC-BY-SA (Attribution-ShareAlike)
CC-BY-NC (Attribution-NonCommercial)
CC-BY-ND (Attribution-NoDerivatives)
CC-BY-NC-SA (Attribution-NonCommercial-ShareAlike)
CC-BY-NC-ND (Attribution-NonCommercial-NoDerivatives)
Creative Commons also offers a public domain license, often styled as CC0 (CC Zero), as a way to visually stamp something as in the public domain.
To add a Creative Commons license to a work, there are two important factors to consider:
The grid below is a useful tool for visualizing what permissions are associated with each type of Creative Commons license as well as resources in the public domain.2
1Creative Commons (n.d.) About CC licenses. https://creativecommons.org/about/cclicenses/
2JoKalliauer; foter. (2015). Creative Commons licenses. https://commons.wikimedia.org/wiki/File:Creative_Commons_Licenses.png