Each logical compartment includes a placement policy including a set of storage placement rules for {HEAD ~ placement} of storage symbols into {TAIL ~ a set} of physical storage containers 
Each logical compartment includes a placement policy including a set of storage placement rules for { HEAD ~ placement } of storage symbols into { TAIL ~ a set } of physical storage containers
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH