Meta-Model/AE - (Apr 22 1:30-2:00)				
	1 table/class										
	Attribute MEXes -> Source table (MEX + Output)			
	PDIF -> STs											
		Feature -> Region									
	AE implications (iterate over something other than dataset)
		Dynamic typing for references							
	AE oddities (VMEx, Universal NEXs, Arity Mismatches, 1-step look-back for reuse)