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