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Open-Source Rules comes with no warranty of any kind. As each source file states in its header, it is a copyrighted code that is distributed free-of-charge, under the terms of the GNU Public License (GPL). This is often referred to as open-source distribution - see or for more information. The legal text of the GPL is in the LICENSE file that is included in the distribution.

Here is a summary of what the GPL means for users:

(1) Anyone is free to use, modify, or extend in any way they choose, including for commercial purposes.

(2) If you distribute a modified version of, it must remain open-source, meaning you distribute it under the terms of the GPL. You should clearly annotate such a code as a derivative version of

(3) If you release any code that includes source code, then it must also be open-sourced, meaning you distribute it under the terms of the GPL.

(4) If you give files to someone else, the GPL LICENSE file and source file headers (including the copyright and GPL notices) should remain part of the code.

This page describes how you can contribute to an open-source code like