1. Discourse as discoursed
2. Discourse as stored
3. Story as discoursed
4. Stories as stored (potential story lines) (Liestol 1994, 97). The story as discoursed can be seen as parallel to my idea of reader's choosing the order of events told, discourse as discoursed being parallel to the reader's activity as co-narrator (who is restricted by the 'discourse as stored', that is the hypertext as whole, including not only the text lexias, but also the linking structure).
see Liestol's "Wittgenstein, Genette, and the Reader's Narrative in Hypertext" (1994).