[IBR-002-OM] - Invoice UUID (BTOM-002) must contain only letters, digits, and dashes.
IBR-002-OM
ubl:Invoice | cn:CreditNote
matches(normalize-space(cbc:UUID),'^[0-9a-fA-F]{8}-[0-9a-fA-F]{4}-[0-9a-fA-F]{4}-[0-9a-fA-F]{4}-[0-9a-fA-F]{12}$')