What are GPL, lgpl, and GFDL? They andSource codeWhat is the relationship between commercial sales?
GPL isGNU General Public License
(GNU General Public License). lgpl isGNU lesser General Public License
(GNU wide General Public License), formerly called GNU Library General Public License (GNU Library General Public License); GFDL isGNU Free Documentation License
(GNU Free Documentation License. They are universal copyright verification protocols for Free Software and are developed and released by the Free Software Foundation (FSF.
- GPL-based software can be commercially sold, but the source cannot be closedCode.
- If you make any changes and/or re-develop and release the software that complies with GPL, your product must inherit the GPL protocol and do not allow closed source code.
- Lgpl-based software can also be commercially sold, but Source Code cannot be closed.
- If you make any changes and/or re-develop and release the software that complies with lgpl, your product must inherit the lgpl protocol and do not allow closed source code. However, if yourProgramIf you connect or call software that complies with the lgpl, rather than including the software, the source code can be closed.