Invoice type code 326 or 384 are only allowed when both buyer and seller are German organizations
PEPPOL-EN16931-P0112pxs-taxdata:TaxData/pxs-taxdata:ReportedTransaction/pxs-taxdata:ReportedDocument/pxs-taxdata:DocumentTypeCodenot(normalize-space(.) = '326' or normalize-space(.) = '384') or ($supplierCountryIsDE and $customerCountryIsDE)