There is one Navigation Map per system. The purpose of the Navigation Map is to express the principal user
interface paths through the system. These are the main pathways through the screens of the system and not
necessarily all of the possible paths. It can be thought of as a road map of the system's user interface.
The Navigation Map serves as a backdrop and a link between the individual Storyboards. The Storyboards describe how the user
moves navigates through the user-interface elements to perform system features and the the Navigation Map
defines what the valid navigation paths are. The Navigation Map conveys the structure of the system's user
interface, and the Storyboards convey the dynamics.
The Navigation Map makes it easy to see how many "clicks" it will take a user to get to a specific screen.
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