@yuhuisg, I tried to use list2 with API 1.4 but I got an error. It is not supported. I m trying to read the string like this "1|2" by using this regex in Classification Builder((?:[^\\|]+|\\\|?)+). Any idea how to match 1 and 2? I tried ((?:[^\\|]+|\\\|?)+) but it doesnt work.
@Luca_Lattarini also, I don't think Classification will work in your use case. Classification means that for your variable, you have defined 2 classifications for it (e.g. like 2 sub-variables), and you want to use "1" in the first classification, and "2" in the second classification. But you're splitting the "1|2" string "horizontally", when based on your original post, you want to split the string "vertically".