An advantage of the present invention is that a complete set of tracking records for a package hierarchy, such as a pallet of boxes, where {HEAD ~ each box} contains {TAIL ~ a number} of packages etc., can be obtained in one single trace 
contains
An advantage of the present invention is that a complete set of tracking records for a package hierarchy , such as a pallet of boxes , where { HEAD ~ each box } contains { TAIL ~ a number } of packages etc . , can be obtained in one single trace
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH 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 TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH