warningEN 16931syntax binding ruleUBL
A UBL invoice should not include the InvoiceLine Item Price AllowanceCharge TaxCategory
The element 'InvoiceLine Item Price AllowanceCharge TaxCategory' is present, but it carries no meaning in the EN 16931 semantic model, so a receiver is free to ignore or reject it.
Remove 'InvoiceLine Item Price AllowanceCharge TaxCategory' from the document. Nothing in EN 16931 maps to it - it is almost always left over from a generic UBL template. Reported as a warning.
UBL — context /ubl:Invoice | /cn:CreditNote
not((cac:InvoiceLine|cac:CreditNoteLine)/cac:Price/cac:AllowanceCharge/cac:TaxCategory)