Q Public License

"QPL" redirects here. For the library system in New York, see Queens Public Library. For the airport in Australia, see Plutonic Airport.
Q Public License
AuthorTrolltech AS
Latest version1.0
PublisherTrolltech AS
Published1999; 25 years ago (1999)
SPDX identifierQPL-1.0
Debian FSG compatibleNo[1]
FSF approvedYes[2]
OSI approvedYes
GPL compatibleNo[2]
CopyleftNo[2]

The Q Public License (QPL) is a non-copyleft license, created by the company Trolltech for its free software edition of the Qt toolkit and framework. It was used until Qt 3.0, until version 4.0 was released under the Free Software Foundation's (FSF) GNU General Public License (GPL) version 2.

It fails the Debian Free Software Guidelines,[1] used by several Linux distributions, though it qualifies for the FSF's Free Software Definition; however, it is incompatible with the FSF's GPL,[2] meaning that products derived from code under both the GPL and the QPL cannot be redistributed.

  1. ^ a b Cite error: The named reference debian was invoked but never defined (see the help page).
  2. ^ a b c d Cite error: The named reference fsf was invoked but never defined (see the help page).