The return announcement line number
retann_Required
No
retann_Examples
<documentReference documentType="ReturnAnnouncement" id="777888" date="2021-12-09" lineNo="1"/> retann_Xpath
/b24Message/returnAnnouncement/item/documentReference[@documentType="ReturnAnnouncement"]/@lineNo
retann_Sort
8800
retann_Id
79
retann_Type
Text