The operation overlaps two event data sets <data1> and <data2> based on the orders that are defined through the corresponding key data sets <key1> and <key2>. The principle is presented in the figure below. The operation assumes that the data sets have been ordered according to the key frame in the ascending order. Then, it compares the "time" frames and collects mized codes to the target frame. New fields in the target data are named by using the names of the data frames and fields (<data>_<field>). In addition, the operation creates a field called "time" to the target data frame to which the matched points are stored.
