[ibr-tdd-30] – The cac:Party element MUST NOT contain elements other than cac:PostalAddress (BG-05) and optionally cac:PartyTaxScheme.
ibr-tdd-30/pxs:TaxData/pxs:ReportedTransaction/pxs:ReportedDocument/cac:AccountingSupplierParty/cac:Partycount(*[not(self::cac:PostalAddress or self::cac:PartyTaxScheme)]) = 0