[IBR-169-OM] - currencyID attribute for Total amount due (profit margin) (BTOM-030) MUST be 'OMR'.
IBR-169-OMubl:Invoice | cn:CreditNotenot(cac:AdditionalDocumentReference[cbc:DocumentTypeCode='PM_TOTAL']/cbc:ID) or cac:AdditionalDocumentReference[cbc:DocumentTypeCode='PM_TOTAL']/cbc:ID = 'OMR'