The document Id for a related Invoice message

GENRAL_Required
No
GENRAL_Examples
 <documentReference documentType="InvoiceBatch" id="456" date="2021-05-01">
        </documentReference> 
GENRAL_Xpath
\b24Message\generalText\documentReference[@documentType="InvoiceBatch"]\@id
GENRAL_Type
Text
GENRAL_Limits

None

GENRAL_Sort
2200
GENRAL_Id
13