[ibr-tdd-48] – The cac:PartyTaxScheme element MUST NOT contain elements other than cbc:CompanyID (BT-063) and cac:TaxScheme.
ibr-tdd-48/pxs:TaxData/pxs:ReportedTransaction/pxs:ReportedDocument/cac:TaxRepresentativeParty/cac:PartyTaxSchemecount(*[not(self::cbc:CompanyID or self::cac:TaxScheme)]) = 0