I recently copied an excerpt written by Janet M. Murray from her book Hamlet on the Holodeck. The article is called The Coming Cyberbard.
This is the follow up portion to the text I referenced, The Shaping Role of the Human Storyteller. In this excerpt, Murray describes a possible model upon which such an immersive theme-world experience might be implemented. The concept is based on Minsky’s theory of Frames. There will be more to come on the implementation of frames to come. Upon the implementation of this model onto an immersive theme-world engine, a solid structure to generate infinite possible theme-worlds is provided.
I am currently looking into this model not only as a foundation for Grammar Based Universes but as an authoring platforms for rewarding, narrative experiences.