I plan to modify quiz 2.0 for my site to handle quizzes to specifically handle traing requirements. Can I do that without violating any licensing (all free, all volunteer site)
also, if the changes are good, how do I formally present it back as a modified module?
Any info, or direction to info would be greatly appreciated!

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This is most certainly allowed to do.

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Free software refers to the idea that you are free and open to modify it to fit your needs. Whether you need it for a volunteer community or a commercial application. You are free to modify it any way you see fit.

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Since the software was issued under the GPL license, if you choose to release it, you cannot limit its distribution in any way. You can even sell it I beleive, although, you must include the full source code with all your changes. So Giving it away is usually what releasing it leads to.

If you sell it to Party A they can release it for free, and you cannot stop them from doing this, since this would be limiting its distribution.

You also need to retain the original authors copyright and credits within the code and xoops_version files. You can add your credits in it as well.

I hope i explained it properly, you can always review the GPL license available at http://www.gnu.org/licenses/licenses.html#GPL for details if you wish.


Best Regards,

thanks so much for taking the time to respond!

My intentions are to present it back here, if I've made what I consider substantial changes, for all to use.