Above is the navigation system visually represented as a diagram of Yumi. From this you can see how the user is able to navigate around the site fairly easily; it is used to simplify our understanding of how the navigation system works.
Available at:https://elliotchrislangley.wordpress.com/2015/04/11/web-app-navigation-system/
(Accessed: 20 April 2015).
sebfaull 