The OGL was intended to be the GPL but for table top games. Admittedly, the settings, characters, books and similar content were never part of the deal. It was

The OGL was intended to be the GPL but for table top games. Admittedly, the settings, characters, books and similar content were never part of the deal. It was more meant to be a common standard that everybody could build on. But a common world that everybody could expand upon, would very quickly become a gigantic mess.