In the most recent project I've been developing I've needed to match up or pair a class name with an identifier from an XML file. Something like this:

<spriteID>SomeClass</spriteID>
[object SomeSprite]

A possible solution to achieve this is demonstrated pseudo code below.

var stageSprite:Object = stageSprit;
var stageSpriteClass:Object = Object(stageSprite).constructor;
var xmlClassName:Object = getDefinitionByName(xmlSpriteID);

if(stageSpriteClass == xmlClassName){
   return true;
}

 Usually you can achieve this dynamically without the need to to compare and associate clips but in case you need to do it this way, you now know how.