Stage Directions Meet Functional Specifications: They Have a Lot in Common
http://www.uxmatters.com/mt/archives/2009/03/stage-directions-meet-functional-specifications-they-have-a-lot-in-common.php

Lepore, Traci
UXmatters
2009

Abstract:

When it comes to modern theater, stage directions—the descriptive text that appears within brackets in a script—are an important piece of the puzzle. They speak for the playwright when he is not there. They provide details about how the playwright has imagined the environment and atmosphere. They describe critical physical aspects of the characters and settings. Stage directions can also be critical in dictating the intended tempo and rhythm of the piece. Whether they establish a production’s overall tone or elucidate particular actions of characters, stage directions help tell the complete story that is in the playwright’s mind. Stage directions accomplish all of this, using a simple convention that structurally separates them from the actual story.