Example.as

// When loader has finished its loading...

var loaderInfo:LoaderInfo = event.target as LoaderInfo;
var mc:MovieClip = loaderInfo.content as MovieClip;

var xml:XML = describeType(mc);
var variable:XMLList = xml.child("variable");

// Correct way, uses temporary variable 
for each (var v:XML in variable) {
	var name:String = v.@["name"];
	trace(name, mc[name]);
}

// Wrong way... Security error because mc directly invokes this.@ (and causes cross-domain policy error)
for each (var v:XML in variable) {
	trace(v.@["name"], mc[v.@["name"]]);
}