The document discusses different theories of narrative structure and codes in media. It explains Claude Levi-Strauss's theory that narratives can be reduced to binary opposites. It also outlines Roland Barthes' identification of semantic, hermeneutic, proairetic, and symbolic codes that show meaning in a text. Specifically, the semantic code refers to additional meanings suggested in a text. The hermeneutic code refers to unexplained elements that intrigue audiences. The proairetic code states that narratives imply further narrative. Finally, the symbolic code refers to symbolism and opposites that create meaning and tension in a story.