The Free Software Foundation has related but distinct criteria for evaluating whether or not a license qualifies software as free software. Most free software licenses are also considered open-source software licenses.[6] In the same way, the Debian project has its own criteria, the Debian Free Software Guidelines, on which the Open Source Definition is based. In the interpretation of the FSF, open-source license criteria focus on the availability of the source code and the ability to modify and share it, while free software licenses focuses on the user's freedom to use the program, to modify it, and to share it.[7]