/**
 * Specifies the external commercial reference type code in the format of a character string with a maximum length of 4 characters. The list of valid codes is an external code list published separately.
 * ISO20022 External Code
 * Original name: ExternalUnderlyingTradeTransactionType1Code
 */
export declare enum UnderlyingTradeTransactionType {
    /** Underlying transaction is a contract. */
    CONT = "CONT",
    /** Underlying transaction is a delivery order. */
    DELV = "DELV",
    /** Underlying transaction is a proforma invoice. */
    PROF = "PROF",
    /** Underlying transaction is a project. */
    PROJ = "PROJ",
    /** Underlying transaction is a purchase order. */
    PUOR = "PUOR",
    /** Underlying transaction is a quotation. */
    QUOT = "QUOT",
    /** Underlying transaction is a tender. */
    TEND = "TEND"
}