Inspiration

The inspiration is considered to be a type of link between stories. It happens when a story, or an element of it, is created using as a base another element already existing in another story.

An example is the game Donkey Kong that was created on the base of the movie King Kong.

When this happens, it means that the second universe spawned from the first one.

If the inspiration only was on one little element of the story (for example the Hadouken in Street Fighter being inspired on the Kamehameha from Dragon Ball) it still means that that single element spawned from the other universe.