fatalEN 16931syntax binding ruleUBL
Seller tax registration shall occur maximum once
'Seller tax registration' appears more than once, and this profile allows it at most once.
Keep the single correct 'Seller tax registration' and delete the rest. Repeating an element that the semantic model treats as singular is usually a serialiser writing every value it has instead of choosing one.
UBL — context /ubl:Invoice | /cn:CreditNote
(count(cac:AccountingSupplierParty/cac:Party/cac:PartyTaxScheme[cac:TaxScheme/upper-case(cbc:ID)!='VAT']/cbc:CompanyID) <= 1)