an indication mechanism configured to indicate that said information file has sufficiently changed; {HEAD ~ said indication mechanism} coupled to said subscription mechanism and responsive to {TAIL ~ said notification message receiver mechanism} 
responsive to
an indication mechanism configured to indicate that said information file has sufficiently changed ; { HEAD ~ said indication mechanism } coupled to said subscription mechanism and responsive to { TAIL ~ said notification message receiver mechanism }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL