With a number of XML database tools on the market, and the frequenting of this board by the likes of Software AG, eXcelon, and others, has anyone attempted to determine a decision tree governing when to use a dedicated native XML database versus using the native features of Oracle and SQL versus not using XML as a solution at all?  I am struggling right now with deciding which factors should go into this decision and how the ultimate decision should be made.  Any insight would be great!

Brian Magick