At the storyworld level the user can make a number of jumps that need to be considered because of their potential impact on the design of the call-to-action. A number of possible combinations of jumps at this level have been identified by Dena (Dena, 2007). The descriptions of these jumps have been modified slightly here:
- Intra-world: The user moves between stories (sometimes called “event-Realms”) within a storyworld. The stories may be on the same or different mediums (i.e. the user watches a DVD with a feature length movie and then jumps to another DVD with the story’s sequel or alternately from a novel to a DVD). Intra-world jumps occur at the story level of the story ontology.
- Inter-world: The user moves between stories in different storyworlds (i.e. the user watches a movie like Narnia that then goes to a movie or novel from the Lord of the Rings series). Inter-world jumps occur at the story level of the story ontology.
- Extra-world to world: This type of jump moves the user between fictional websites and real-life websites (i.e. the user reads a web-based novel set in a particular location and then jumps to a real-world website to find more information about that setting).
- Meta-world to world: This type of jump moves the user from a commentary about the storyworld to the storyworld itself (i.e. the user reads an online review about the storyworld and follows a link to it).
For information on the direction and timing of the jumps between units, see the interaction design tasks at the story level.