A MappingCallBinding specifies the binding of a single variable or value to the formal parameter of a mapping as part of its inviocatuon or installation.
conformsTo 
				
					Element
				
			
Associations
				
boundVariable : ::MappingParameter[1]
			
The formal parameter bound by the call.
				
mappingCall : ::MappingCall[?]
			
The containing MappingCall.