The PRiME Framework doesn't use the same license for all of the code. There is code under:
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GPLv3+ (GNU General Public License version 3, or any later version)
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LGPLv3+ (GNU Lesser General Public License v3 or any later version)
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BSD with advertising
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Public Domain
Please, check the source code for more details. A license is usually at the start of each source file.
The ./COPYING file (GPLv3+) is the default license for code without an explicitly defined license.