FIG 9 is a diagram illustrating the progress counter 418 updated as a result of {HEAD ~ metadata processing} for {TAIL ~ the example set} of constraints shown in FIG 4C 
FIG 9 is a diagram illustrating the progress counter 418 updated as a result of { HEAD ~ metadata processing } for { TAIL ~ the example set } of constraints shown in FIG 4C
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH