Simple: Number of nodes in an XML file?

I'm migrating to using AS3 for my XML and am missing something basic. How do I find the length of my XML document, the number of total nodes? Clearly I need some sleep.

For example...

PHP Code:

---

var myXML:XML = new XML();
var XML_URL:String = "http://www.example.com/Sample3.xml";
var myXMLURL:URLRequest = new URLRequest(XML_URL);
var myLoader:URLLoader = new URLLoader(myXMLURL);
myLoader.addEventListener("complete", xmlLoaded);

function xmlLoaded(event:Event):void
{
    myXML = XML(myLoader.data);
    trace("Data loaded.");

    //How do I find the length of myXML?
} 


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Hi,
if your xml is like

Code:

---

<data>
<people>
<person>Steve</person>
<person>John</person>
</people>
</data>

---

then, as far as I remember, you can get the number of <person>s by

Code:

---

myXML = XML(myLoader.data);
trace(myXML.people.person.length());//it must trace 2

---

I hope, I'm not wrong. At least, you can try this.