Define movieClip position with XML

I am building a news scrolling (actually personal quotes from people) with an adjoining map. I have also created a small clip that looks like a spot with concentric circles radiating out from the center. As a new quote appears, I want to place the spot on the map corresponding to that person’s location… until the next quote appears, and the spot moves to the next location. How do I write the XML and AS to move my clip as the quote changes… an X,Y attribute or something?