Relationship between the Shipment table and the Invuse table.  Used to find all INVUSE records for a given shipment.  This will return 0 or 1 record.
Razmerje med tabelo Shipment in tabelo Invuse.  Uporablja se za iskanje vseh zapisov INVUSE za dano pošiljko.  Vrne 0 zapisov ali 1 zapis.