View source for MediaWiki:Licenses

* subst:uwl|I don't know what the license is
* Your own work (best practices):
** PD-self|Own work, all rights released (Public domain)
** self|CC0 1.0|Own work, Universal Public Domain Dedication, all rights waived (CC0 1.0)
** self|CC BY 4.0|Own work, attribution required (CC BY 4.0)  
** self|CC BY-SA 4.0|Own work, copyleft, attribution required (CC BY-SA 4.0)
** self|CC BY-NC 4.0|Own work, non-commercial, attribution required (CC BY-NC 4.0)
** self|CC BY-ND 4.0|Own work, no derivatives, attribution required (CC BY-ND 4.0)
** self|CC BY-NC-SA 4.0|Own work, non-commercial, attribution required, share alike (CC BY-NC-SA 4.0)

* Not my own work, but has been released under:
** Creative Commons licenses
*** CC0 1.0|Universal Public Domain Dedication, all rights waived (CC0 1.0)
*** CC BY 4.0|Attribution required (CC BY 4.0)  
*** CC BY-SA 4.0|Copyleft, attribution required (CC BY-SA 4.0)
*** CC BY-NC 4.0|Non-commercial, attribution required (CC BY-NC 4.0)
*** CC BY-ND 4.0|No derivatives, attribution required (CC BY-ND 4.0)
*** CC BY-NC-SA 4.0|Non-commercial, attribution required, share alike (CC BY-NC-SA 4.0)
** Free Art License
*** FAL 1.3|Free Art License

* Public domain:
** PD-USGov-NASA|Original work of NASA
** PD-ineligible|Too simple to be copyrighted

* Other alternatives:
* subst:uwl|I found the image from a search engine or a random website
** Fair use|Fair use image
** Copyrighted free use|Copyrighted, but may be used for any purpose, including commercially
** Attribution|May be used for any purpose, including commercially, if the copyright holder is properly attributed
** GPL|Screenshot from a software program that is licensed under GPL