Introduction to XML in Flash
       by senocular

XML Basics
Before using XML in Flash, lets first learn what XML is, at least at its basic form. Entire books have been written on XML and the use of XML in Flash. Here, I intend to keep things simple enough to get you started yet attempt to provide you with enough information to at least make you feel comfortable when working with XML in Flash.

So, XML; what is it and why does it exist? Basically, XML (eXtensible Markup Language) is a tagged markup format that was created to serve as an easily usable, readable method to format information within a basic text file. One of its primary advantages is that it allows you to store this information in a hierarchical manner. This means you can store information within other chunks of information much like a folder hierarchy on your computer. In fact, you can think of XML just as that, as a text write-out of a hierarchical file system which stores textual information. XML is NOT really a script and does NOT really "do" anything; it's basically just a fancy text file (though based on what you are using to interpret the XML it could potentially be script-like). Where you may normally use a text file, you can instead use XML where XML will provide you with greater structure and clarity for storing the content within.

For more information on XML beyond laymen's terms, see:
http://www.xml.com/
http://www.w3.org/XML/