DE-R-026
If both supplier and customer are located in Germany, and if "Invoice type code" (BT-3) contains the code 384 (Corrected invoice), "PRECEDING INVOICE REFERENCE" (BG-3) should be provided at least once.
warning: reported, still valid
Peppol documentation ↗
What the rule checks
As the rule set's publisher wrote it. The rule runs on every element the context matches, and fails where the test is false; the validator reports the line of that element.
Context
(/ubl-invoice:Invoice | /ubl-creditnote:CreditNote)[$supplierCountryIsDE and $customerCountryIsDE]Test
((not(normalize-space(cbc:InvoiceTypeCode) = '384' or normalize-space(cbc:CreditNoteTypeCode) = '384') or (cac:BillingReference/cac:InvoiceDocumentReference)))Checked with Peppol BIS Billing 3.0 Invoice, Peppol BIS Billing 3.0 Credit Note