The policy adapters transform the single unified method call into {HEAD ~ formats} acceptable by each associated policy servers and place {TAIL ~ the transformed requests} to the associated servers 
The policy adapters transform the single unified method call into { HEAD ~ formats } acceptable by each associated policy servers and place { TAIL ~ the transformed requests } to the associated servers
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH