Namespace  - AS3

package {
    import flash.display.Sprite;

    public class NamespaceExample extends Sprite {
        private var rss:Namespace = new Namespace("http://purl.org/rss/1.0/");
        private var rdf:Namespace = new Namespace("http://www.w3.org/1999/02/22-rdf-syntax-ns#");
        private var dc:Namespace  = new Namespace("http://purl.org/dc/elements/1.1/");

        public function NamespaceExample() {
            var myXML:XML = getRSS();
            var rssItems:Array = parseRSS(myXML);
            
            var len:uint = rssItems.length;
            for (var i:uint; i < len; i++) {
                trace(rssItems[i].title);
                trace(rssItems[i].creator);
                trace(rssItems[i].date);
                // Adobe Flash Developer Center
                // Adobe
                // 2005-08-08
                // Flex Developer Center
                // Adobe
                // 2005-10-16                
            }
        }
        
        private function parseRSS(rssXML:XML):Array {
            default xml namespace = rss;

            var items:XMLList = rssXML.item;

            var arr:Array = new Array();            
            var len:uint = items.length();
            for (var i:uint; i < len; i++) {
                arr.push({title:items[i].title, creator:items[i].dc::creator, date:items[i].dc::date});
            }
            
            return arr;
        }

        private function getRSS():XML {
            var myXML:XML =  <rdf:RDF
              xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
              xmlns="http://purl.org/rss/1.0/"
              xmlns:dc="http://purl.org/dc/elements/1.1/"
            >
              <channel rdf:about="http://www.xml.com/cs/xml/query/q/19">
                <title>Test RSS</title>
                <link>http://www.adobe.com/</link>
                <description>This is a test RSS document.</description>
                <language>en-us</language>
                <items>
                  <rdf:Seq>
                <rdf:li rdf:resource="http://www.adobe.com/devnet/flash/"/>
                <rdf:li rdf:resource="http://www.adobe.com/devnet/flex/"/>
                  </rdf:Seq>
                </items>
              </channel>
              <item rdf:about="http://www.adobe.com/devnet/flash/">
                <title>Adobe Flash Developer Center</title>
                <link>http://www.adobe.com/devnet/flash/</link>
                <description>Welcome to the Flash Developer Center</description>
                <dc:creator>Adobe</dc:creator>
                <dc:date>2005-08-08</dc:date>    
              </item>
              <item rdf:about="http://www.adobe.com/devnet/flex/">
                <title>Flex Developer Center</title>
                <link>http://www.adobe.com/devnet/flex/</link>
                <description>Welcome to the Flex Developer Center</description>
                <dc:creator>Adobe</dc:creator>
                <dc:date>2005-10-16</dc:date>    
              </item>
            </rdf:RDF>;
            
            return myXML;
        }
    }
}

package {

    import flash.display.Sprite;

    public class Namespace_2_Example extends Sprite {    
        public function Namespace_2_Example() {
            var vocab:MultilingualVocabulary = new MultilingualVocabulary();

            trace(vocab.hello());    // hello
            
            var languages:Array = vocab.getLanguages();
            
            for (var i:uint; i < languages.length; i++) {
                var ns:Namespace = languages[i];
                if (ns != null) {
                    trace(ns.toString() + ": " + vocab.ns::hello());
                    // hello
                    // MultilingualVocabulary:Hawaiian: aloha
                    // MultilingualVocabulary:French: bon jour
                }
            }
        }
    }    
}

class MultilingualVocabulary {
    public namespace French;
    public namespace Hawaiian;
    private var languages:Array;

    public function MultilingualVocabulary() {
        languages = new Array(Hawaiian, French);
    }
        
    public function hello():String { 
        return "hello";
    }

    Hawaiian function hello():String {
        return "aloha";
    }

    French function hello():String { 
        return "bon jour";
    }
        
    public function getLanguages():Array {
        return languages;
    }
}

package {
    import flash.display.Sprite;
  
    public class Namespace_3_Example extends Sprite {     
        public function Namespace_3_Example() {
            addChild(new StateButton("Press Me."));
        }
    }
}

import flash.display.Sprite;
import flash.text.TextField;
import flash.events.Event;
import flash.events.MouseEvent;

class StateButton extends Sprite{
    private namespace out;
    private namespace over;
    private namespace down;
    private var label:TextField;
    private var labelTxt:String;
    private var ns:Namespace;
    out var bgColor:Number = 0xFF0000;
    over var bgColor:Number = 0xFFFF00;
    down var bgColor:Number = 0xFFFFFF;
      
    public function StateButton(str:String) {
        buttonMode = true;
        labelTxt = str;
        ns = out;
        draw();
        addLabel();
        addListeners();
    }

    private function addLabel():void {
        label = new TextField();
        label.text = labelTxt;
        label.width = 50;
        label.height = 20;
        label.mouseEnabled = false;
        addChild(label);
    }
      
    private function addListeners():void {
        addEventListener(MouseEvent.MOUSE_UP, mouseOverHandler);
        addEventListener(MouseEvent.MOUSE_OUT, mouseOutHandler);
        addEventListener(MouseEvent.MOUSE_OVER, mouseOverHandler);
        addEventListener(MouseEvent.MOUSE_DOWN, mouseDownHandler);
    }
 
    private function mouseOutHandler(e:Event):void {
        ns = out;
        draw();
    }
 
    private function mouseOverHandler(e:Event):void {
        ns = over;
        draw();
    }
 
    private function mouseDownHandler(e:Event):void {
        ns = down;
        draw();
    }
 
    private function draw():void {
        this.graphics.clear();
        this.graphics.beginFill(ns::bgColor);
        this.graphics.drawRect(0, 0, 60, 20);
    }
}