Using Expressions within Literals: embed ActionScript code directly into your XML data.
package{ import flash.display.Sprite; public class Main extends Sprite{ public function Main(){ var squareLength:Number = 10; var circleRadius:Number = 5; var shapeData:XML = <shapeList> <shape type="square" size={squareLength} /> <shape type="cicle" size={circleRadius} /> </shapeList>; trace(shapeData.toXMLString()); } } }