Part of the Software development glossary:

The Apache License is a free and open source software (FOSS) licensing agreement from the Apache Software Foundation (ASF). 

The agreement stipulates terms for use, reproduction, modification and distribution of any software that is released under the Apache License. Following are some of the core specifications of the Apache License 2.0: 

  • Software may be freely used, reproduced, modified, distributed or sold.
  • Software can be combined with other products and distributed or sold as packages.
  • Products derived or modified from licensed software can be distributed under other licenses.
  • Apache software cannot be redistributed without attribution.
  • A copy of the license must be redistributed along with any Apache software.
  • External contributions to the software are released under the ASF terms unless explicitly specified otherwise.

All ASF software is released under the Apache license, unless it is specified otherwise. The licensing model is also freely available for use by non-ASF developers. Apache License 2.0 and GNU General Public License (GPL) version 3 are considered compatible, which means that developers may freely mix code from software released under those licenses. However, the resulting software must be released under GPL v. 3. Earlier versions of the licensing models are considered incompatible. 

 

This was last updated in August 2013
Contributor(s): Ivy Wigmore
Posted by: Margaret Rouse

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