RE: Boundary Conditions

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http://forums.oscommerce.com/viewtopic.php?p=166401#166401
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[quote]Anything I develop in PHP that is called by OSC code becomes part of OSC and is governed by the terms of GPL, is that correct?[/quote]
Let's be accurate :-)

If something is included in osCommerce by calling an include() statement, it becomes one source in memory. This complete source code gets interpreted by the PHP-Interpreter. As the code that includes your code is GPLed, the whole source (including your work) in under GPL. This however does not mean that the copyright of your work is taken over by osCommerce. It merely means that the work as a whole is now under GPL.

Same goes for any program that calls functions from osCommerce. This is explained in the GPL-FAQ under

http://www.fsf.org/licenses/gpl-faq.html#GPLModuleLicense

and

http://www.fsf.org/licenses/gpl-faq.html#GPLAndPlugins

HTH