[Zope] Separate data from control automatically

Is it possible for zope to separate control from data automatically? To make the best use of Zope, it will be necessary to separate the data and control. with XML, DOM will assign id for each node and thus all of them can be refered by that id. Is it possible for zope to perform this? Will a modify of load_site able to do this semi-automatically? (run load_site over an existing zope tree?) Rgs, Kent Sin