License Clarification

[ryanford]

Can you explain the dual licensing for ScrollMagic? It appears that with the exception of GSAP use, ScrollMagic and the other plugins (not GSAP) are MIT license compatible, and there is an MIT license included. Where does the GPL 3.0 come in?

[winterrocks]

Good guestion @ryanford:

https://github.com/janpaepke/ScrollMagic/blob/master/LICENSE.md states:

ScrollMagic is dual licensed under the terms of the MIT license (below) and the GPL.

and I clearly see word and there between the licenses.

At file level, https://github.com/janpaepke/ScrollMagic/blob/master/scrollmagic/uncompressed/ScrollMagic.js states:

 * @version 2.0.8
 * @license Dual licensed under MIT license and GPL.
 * @author Jan Paepke - [email protected]

and again I see word and between MIT and GPL.

[MPriess]

In the package.json OR is used:
"license": "(MIT OR GPL-3.0+)",

[winterrocks]

In the package.json OR is used: "license": "(MIT OR GPL-3.0+)",

I guess that OR is for file level and for that package.json only?