Data values are acquired for {HEAD ~ a set} of {TAIL ~ metrics} for the target and each field web site 
of
Data values are acquired for { HEAD ~ a set } of { TAIL ~ metrics } for the target and each field web site
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