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Apache License v2.0 and GPL Compatibility - The Apache Software Foundation (1288 words) |
 | The Apache Software License is incompatible with the GPL because it has a specific requirement that is not in the GPL: it has certain patent termination cases that the GPL does not require. |
 | The Apache Software Foundation believes that you should always try to obey the constraints expressed by the copyright holder when redistributing their work, even when those constraints may be unclear. |
 | The Apache Software Foundation is well aware of these clauses and their purpose under copyright law: to ensure that code distributed under the terms of the GPL remains under the GPL. |
| Apache License - Wikipedia, the free encyclopedia (652 words) |
 | All software produced by the ASF or any of its projects or subjects is licensed according to the terms of the Apache License. |
 | The Apache License (versions 1.0, 1.1, and 2.0) require preservation of the copyright notice and disclaimer, but it is not a copyleft license - it allows use and distribution of the source code in both open source and closed source software. |
 | The Free Software Foundation considers all versions of the Apache License incompatible with the Version 2 of the GNU General Public License. |