fatal UBL
[PEPPOL-COMMON-R050]-Australian Business Number (ABN) MUST be stated in the correct format.
cbc:EndpointID[@schemeID = '0151'] | cac:PartyIdentification/cbc:ID[@schemeID = '0151'] | cbc:CompanyID[@schemeID = '0151']
matches(normalize-space(), '^[0-9]{11}$') and u:abn(normalize-space())
Source: Peppol BIS Billing 3.0 Schematron, UBL (OpenPeppol, docs.peppol.eu validation artefacts 3.0.21).
Invoice XML (UBL 2.1 Invoice/CreditNote or UN/CEFACT CII D16B, max 5 MB):
Validate