{HEAD ~ The federated folder} and {TAIL ~ its associated storage structure} have the capability to save its instances persistently 
{ HEAD ~ The federated folder } and { TAIL ~ its associated storage structure } have the capability to save its instances persistently
HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH