Jesse James Garrett maintains a wonderful tutorial on how to describe visually interaction design.

Diagrams are an essential tool for communicating information architecture and interaction design in Web development teams. This document discusses the considerations in development of such diagrams, outlines a basic symbology for diagramming information architecture and interaction design concepts, and provides guidelines for the use of these elements.

Eric Turner’s quick reference guide is an easy one-page description of all the elements. And Scott Larson created this handy cheatsheet for quick reference to the various conditional elements.

Tags: information visualization, interaction design, flowcharts