ActionScript 3.0 :: Write Some Xml And Save It To A File In AIR?

I have to write some xml and save it to a file in AIR, and I've realised I'm not very good at it.My data is currently stored in an ArrayCollection of Product Objects, and needs to be serialised in the format:

Code:
<data>
<product page="1" id="product_1" pid="81100"/>
<product page="1" id="product_2" pid="81109"/>
<product page="1" id="product_3" pid="81252"/>
<product page="1" id="product_4" pid="81194"/>
</data>

At the moment, I have the following code, but it spits trying to create the product attributes.

Code:
var newXmlString:String = "<?xml version="1.0" encoding="UTF-8"?>";
var newXml:XML = new XML();
var data:XMLList = new XMLList(<data></data>)

[code]...