Licence choices

• Two major groups, split by philosophy
• Copyleft
• GPL, LGPL, AGPL, GFDL, ...
• Designed to enforce future freedom
• “Permissive”
• BSD, X11, MIT/Expat, Apache, MPL, ...
• Users not required to pass freedoms on
• Public Domain is not a licence
• Modern collaboration is global, consider all jurisdictions