Federated folders can contain objects or members that are {HEAD ~ documents} and folders stored in {TAIL ~ other heterogeneous datastores} 
stored in
Federated folders can contain objects or members that are { HEAD ~ documents } and folders stored in { TAIL ~ other heterogeneous datastores }
OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL