The Free Software Foundation has determined that the Common Public Attribution License, created by Socialtext, is indeed a free software license.
- Common Public Attribution License 1.0 (CPAL)
This is a free software license. It is based on the Mozilla Public License, and is incompatible with the GPL for the same reasons: it has several requirements for modified versions that do not exist in the GPL. It also requires you to publish the source of the program if you allow others to use it.
The license that closes the ASP loophole is now recognized by both OSI and FSF and was recently adopted by Facebook.
