used to facilitate "time travel" on the web. This protocol allows users to access archived versions of a webpage by negotiating dates within the browser or through an aggregator. IETF Datatracker memento link
The viewer must maintain their own mental "index" of the film’s 85+ temporal shifts (anachronies) to solve the puzzle, making the viewing experience an active cognitive exercise. Critical Analysis: Memento - s4934045 index of memento link