An example that accepts a stream of RFID readings representing cases and pallets on a conveyor belt, and outputs XML nodes describing the contents of each pallet.
It is assumed that there may be any number of redundant readings for a given case or pallet, and that the closest pallet to a given case is considered to be the one that contains the case. RFID tags of pallets always begin with the characters "RSP" (Regular Shipping Pallet), "OSP" (Old Shipping Pallet), or "CSP" (Cleveland Shipping Pallet); all other prefixes are assumed to represent cases.