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All software produced by The Apereo Foundation or any of its projects or subjects is licensed according to the terms of the Educational Community License (ECL). In addition, the whole compilation which the Apereo Foundation releases as the Sakai Collaboration and Learning Environment (CLE) is licensed under the terms of the ECL. The ECL was certified by the Open Source Initiative in 2005. It is important to understand, however, that many component parts of the Sakai software distributions retain their original copyright and licensing terms.
The Apereo Foundation believes that open-open licensing is fundamental to achieving the goals of the Sakai Community. The ECL is "open-open" because it permits unrestricted, use, modification, and distribution without a copyleft provision to require downstream modification to carry the same terms. The ECL is fundamental to achieving the goals of the Apereo Foundation and supportive of collaborative development across both nonprofit and commercial organizations. The ECL was certified by the Open Source Initiative in 2005.
Sakai CLE distributions starting with version 2.6 are licensed under the ECL 2.0, unless otherwise explicitly stated. Earlier Sakai CLE distributions (versions 1.0-2.5) were licensed under the terms of ECL 1.0.
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