A group of business terms providing information on one or more preceding Invoices.
cac urn:oasis:names:specification:ubl:schema:xsd:CommonAggregateComponents-2"| Card | Name | Description | 
|---|---|---|
| 1..1 | cac:InvoiceDocumentReference | 
             
                INVOICE DOCUMENT REFERENCE  | 
    
| Identifier/Error message | Flag | 
|---|---|
| DE-R-026 If "Invoice type code" (BT-3) contains the code 384 (Corrected invoice), "PRECEDING INVOICE REFERENCE" (BG-3) should be provided at least once.  | 
            warning |