RETRIEVE,
    CLASS      = OD,
    TYPE       = OB,
    STREAM     = OPER,
    EXPVER     = 0001,
    REPRES     = BU,
    OBSTYPE    = 1,
    DATE       = 20210501,
    TIME       = 2101,
    DOMAIN     = G,
    TARGET     = reference.xoB8Cx.data,
    DUPLICATES = KEEP,
    RANGE      = 179