• Unknown_copyright|I don't know exactly
  • Free Licenses:
    • PD|PD: public domain
    • CC-by-sa-4.0|Creative Commons Attribution ShareAlike 4.0
    • GFDL|GFDL: GNU Free Documentation License
    • GPL|GPL: GNU General Public License
    • LGPL|LGPL: GNU Lesser General Public License
  • Non-free:
    • Copyrighted|Copyrighted image (User owns the copyright)