The reference date of an agreement

retann_Required
No
retann_Examples
 <documentReference documentType="AgreementNumber" id="325899" date="2021-12-09"/> 
retann_Xpath
/b24Message/returnAnnouncement/documentReference[@documentType="AgreementNumber"]/@date
retann_Sort
2600
retann_Id
17
retann_Type
Date/Time