Creative Commons (CC) licenses allow authors to share their works with the public by determining which rights they reserve for themselves and which they grant to others.
They are in fact based on the concept of "some rights reserved," according to which the author (rights holder) decides which rights to reserve and which to grant for use.
The purpose of CC licenses is to facilitate the dissemination and reuse of works of the intellect (text, images, music, video, etc.) while respecting the author's desire to retain some rights.
Types of Creative Commons licenses:
1. CC BY (Attribution): allows anyone to copy, distribute, modify, and use the work, including for commercial purposes, provided that authorship is properly attributed to the original author.
2. CC BY-SA (Attribution-Share Alike): similar to CC BY, but requires that any derivative works be distributed under the same license as the original.
3. CC BY-ND (Attribution - No Derivative Works): allows distribution of the work, including for commercial purposes, but does not allow modification or creation of derivative works. Attribution to the author is always required.
4. CC BY-NC (Attribution-Noncommercial): allows copying, distribution, and modification of the work, as long as they are not done for commercial purposes and the author is always cited.
5. CC BY-NC-SA (Attribution - Noncommercial - Share Alike): allows use and modification of the work for non-commercial purposes, but requires that any derivative works be released under the same license and the author be attributed.
6. CC BY-NC-ND (Attribution-Noncommercial-No Derivative Works): allows only the distribution of the work without modification and only for noncommercial purposes, with attribution required.
For more information on CC licenses please see the official site (in English) and the Creative Commons site in Italian
.