This document outlines the key codes and conventions of documentaries according to documentary maker John Corner. It identifies the 5 central elements of documentaries as observation, interview, dramatization, mise en scene, and exposition. Observation and interviews are the primary techniques used to gather information and support arguments. Dramatization, mise en scene, and exposition are employed to construct reality and reveal the documentary's topic or argument. Additionally, documentaries rely on narrative conventions including a beginning, middle, and end, focus on conflict, and use of music to engage audiences.