/**
 * RETS version
 */
export declare enum RetsVersion {
    /**
     * RETS 1.5
     */
    V1_5 = "RETS/1.5",
    /**
     * RETS 1.7
     */
    V1_7 = "RETS/1.7",
    /**
     * RETS 1.7.2
     */
    V1_7_2 = "RETS/1.7.2",
    /**
     * RETS 1.8
     */
    V1_8 = "RETS/1.8",
    /**
     * RETS 1.9
     */
    V1_9 = "RETS/1.9",
    /**
     * CREA DDF (same as V1_7_2)
     */
    CREA_DDF = "RETS/1.7.2"
}