[ibr-tdd-55] – The cac:PaymentMandate (BG-19) element MUST NOT contain elements other than cbc:ID (BT-089) and cac:PayerFinancialAccount.
ibr-tdd-55/pxs:TaxData/pxs:ReportedTransaction/pxs:ReportedDocument/cac:PaymentMeans/cac:PaymentMandatecount(*[not(self::cbc:ID or self::cac:PayerFinancialAccount)]) = 0