The document Id for a related Invoice message

GENRAL_Required
No
GENRAL_Examples
 <documentReference documentType="InvoiceNumber" id="95159" date="2021-03-05">
        </documentReference> 
GENRAL_Xpath
\b24Message\generalText\documentReference[@documentType="InvoiceNumber"]\@id
GENRAL_Type
Text
GENRAL_Limits

None

GENRAL_Sort
2000
GENRAL_Id
11