Package type, for example PX for pallet and BX for box. First package element should always have packageType="shipment", this is a virtual first level for the package hiearchy

recadv_Examples
 <package packageType="" quantity="1" hierarchyIdentity="1" SSCC="" trackingUrl="http:/findPackageStatus.nu/454545"> 
recadv_XPATH

/b24Message/receivingAdvice/package/@packageType

recadv_Required
Yes
recadv_Sort
46