In computing, the CPL (Common Public License) is a free software / open-source software license published by IBM. The Free Software Foundation and Open Source Initiative have approved the license terms of the CPL.
The CPL has the stated aims of supporting and encouraging collaborative open-source development while still retaining the ability to use the CPL'd content with software licensed under other licenses, including many proprietary licenses. The Eclipse Public License (EPL) consists of a slightly modified version of the CPL.
The CPL has some terms that resemble those of the GNU General Public License (GPL), but some key differences exist. A similarity relates to distribution of a modified computer program: under either license (CPL or GPL), one must make the source code of a modified program available to others.
CPL, like the GNU Lesser General Public License, allows non-CPL-licensed software to link to a library under CPL without requiring the linked source code to be made available to the licensee.
CPL lacks compatibility with both versions of the GPL because it has a "choice of law" section in section 7, which restricts legal disputes to a certain court. Another source of incompatibility is the different copyleft requirements.
Microsoft has released its Windows Installer XML (WiX) developer tool, Windows Template Library (WTL) and the FlexWiki engine under the CPL as Sourceforge projects.
IBM, along with several people from academia, started CPL licensed COIN-OR projects to provide free and open-source software relating to optimization and operational analysis. The initiative led to establishment of the COIN-OR Foundation.
To reduce the number of open source licenses, IBM and Eclipse Foundation agreed upon using solely the Eclipse Public License in the future. Open Source Initiative therefore lists the Common Public License as deprecated and superseded by EPL.
Famous quotes containing the words common, public and/or license:
“When we are high and airy hundreds say
That if we hold that flight they’ll leave the place,
While those same hundreds mock another day
Because we have made our art of common things ...”
—William Butler Yeats (1865–1939)
“[Rutherford B. Hayes] was a patriotic citizen, a lover of the flag and of our free institutions, an industrious and conscientious civil officer, a soldier of dauntless courage, a loyal comrade and friend, a sympathetic and helpful neighbor, and the honored head of a happy Christian home. He has steadily grown in the public esteem, and the impartial historian will not fail to recognize the conscientiousness, the manliness, and the courage that so strongly characterized his whole public career.”
—Benjamin Harrison (1833–1901)
“Surely the fates are forever kind, though Nature’s laws are more immutable than any despot’s, yet to man’s daily life they rarely seem rigid, but permit him to relax with license in summer weather. He is not harshly reminded of the things he may not do.”
—Henry David Thoreau (1817–1862)