[UBL-CR-002]-A UBL invoice should not include the UBLVersionID or it should be 2.1
UBL-CR-002
pxs-taxdata:TaxData/pxs-taxdata:ReportedTransaction/pxs-taxdata:ReportedDocument
not(cbc:UBLVersionID) or cbc:UBLVersionID = '2.1'