Documentaries are a form of movie media known as a nonnarrative formal system. Breaking the system down into smaller categories, four groups emerge (categorical, associational, rhetorical, and abstract). Focusing on the associational and rhetorical style will help to analyze the documentaries Man with a Movie Camera (Dziga Vertov), Roger and Me (Michael Moore), The Thin Blue Line (Errol Morris) and Black Is Black Ain't (Marlon Riggs). The associational formal system lends itself to the Soviet montage school of editing. Instead of using a 'straightforward' image to convey a topic this system is more about juxtaposing v