[ALIGNED-IBRP-000-OM] - Transaction type (BTOM-001) must be present and must be a 20-character bitmap of '1' and '0' with at least one '1' marking an active transaction type.
ALIGNED-IBRP-000-OMubl:Invoice | cn:CreditNote$txnType != '' and $isValidBitString and contains($txnType, '1')