Convert string to XML - how?

programming flash
1

I want to take the following information, which I have as a string in Flash, and convert it into an XML object in AS3:

// information
<list>
<a>
<pageTitle>What is a Change Request?</pageTitle>
<keyword1>Change request</keyword1>
<keyword2>CR</keyword2>
<keyword3></keyword3>
</a>
</list>

// my information as a string
var myStr:String = “<list><a><pageTitle>What is a Change Request?</pageTitle><keyword1>Change request</keyword1><keyword2>CR</keyword2><keyword3></keyword3></a></list>”

// How to convert this string to an XML object?
var myXML:XML = do what with myStr from above ???

Any input is greatly appreciated!