In {TAIL ~ one embodiment}, {HEAD ~ each global interface} includes a request agent , a directory agent and a slave agent  
In
In { TAIL ~ one embodiment } , { HEAD ~ each global interface } includes a request agent , a directory agent and a slave agent
REL TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH