This document discusses different theories and concepts related to narrative structure. It begins by distinguishing between a story and a narrative, with a story being the events and a narrative being how the story is told. It then covers various structural elements of narratives including genre, character, form, and time. Common narrative structures like linear, open and closed are defined. The document also summarizes theories from Roland Barthes, Vladimir Propp, Claude Levi-Strauss, Joseph Campbell, and Tzvetan Todorov on narrative codes, character types, binary oppositions, archetypes, and equilibrium models of narrative.