Documenting the Design of Rich Internet Applications: A Visual Language for State
http://www.uxmatters.com/MT/archives/000251.php

Cecil, Richard F.
UXmatters
2007

Abstract:

Ajax and Rich Internet Applications (RIAs) have revolutionized the way users interact with Web sites. However, documenting the design of any page that uses Ajax is a challenge, because the page--and, more importantly, components on the page--can have different states, depending on how users interact with the page's components.