Each entry is associated with one of a plurality of communication types and includes {HEAD ~ an identifier} for {TAIL ~ use} with an application of the associated communication type 
Each entry is associated with one of a plurality of communication types and includes { HEAD ~ an identifier } for { TAIL ~ use } with an application of the associated communication type
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH