They got something called
MXML
here's the sample Hello World
Code:
<?xml version="1.0" encoding="utf-8"?>
<mx:Application
xmlns:mx="http://www.adobe.com/2006/mxml"
viewSourceURL="src/HelloWorld/index.html"
horizontalAlign="center" verticalAlign="middle"
width="300" height="160"
>
<mx:Panel
paddingTop="10" paddingBottom="10" paddingLeft="10" paddingRight="10"
title="My Application"
>
<mx:Label text="Hello World!" fontWeight="bold" fontSize="24"/>
</mx:Panel>
</mx:Application> Adobe - Coding with MXML and ActionScript