package dbtoxmlweavingmm {

-- Model class. Distinguish between left and right references
	class DBModel extends WModel {
		reference leftModel container subsets wovenModel: ModelRefXMILeft;
		reference rightModel container subsets wovenModel: ModelRefXMIRight;
	}

-- Model references. To keep track of woven models
	abstract class ModelRefXMI extends WModelRef{
		attribute type : String;
		reference ownedElementRef[0-*] container : ElementRefXMI oppositeOf modelRef;		
	}
	
	class ModelRefXMILeft extends ModelRefXMI {		
	}	

	class ModelRefXMIRight extends ModelRefXMI {
	}	
	
-- references to each woven element
	class ElementRefXMI extends WElementRef{
		reference modelRef: WModelRef oppositeOf ownedElementRef;
	}

class RootElement extends WLink {	
} 
	
-------------------------------------------
-- indicates the base element link. It will be used 

	class ElementLink extends WLink {		
	}			
-------------------------------------------
-- equality semantics
	class Equals extends WLink {
	}
	
	class Left extends WLinkEnd{
	}
		
	class Right extends WLinkEnd{
	}		
-------------------------------------------
-- nested semantics
	
	class Nested extends WLink {
	}
	
	class Parent extends WLinkEnd{
	}		
	
	class Child extends WLink{
	}	
-------------------------------------------	
-- foreign key semantics

	class FK extends WLinkEnd {	
		reference sourceElement container : source;
		reference FKAttribute container : FKAttr;
		reference IDAttribute container : IDAttr;
	}
	
	class source extends WLinkEnd{
	}

	class FKAttr extends WLinkEnd{
	}

	class IDAttr extends WLinkEnd{
	}
	
	
}