[ibr-tdd-64] – The cac:TaxScheme element MUST NOT contain elements other than cbc:ID.
ibr-tdd-64
/pxs:TaxData/pxs:ReportedTransaction/pxs:ReportedDocument/cac:AllowanceCharge/cac:TaxCategory/cac:TaxScheme
count(*[not(self::cbc:ID)]) = 0