What is the name of this public copyright license that may be used by tabletop role-playing game developers, in which Dawning Star is published under it?
Dawning Star:  It is published under the Open Game License. Open Game License: The Open Game License (OGL) is a public copyright license that may be used by tabletop role-playing game developers to grant permission to modify, copy, and redistribute some of the content designed for their games, notably game mechanics.
i don't know