Thanks again Alessandro I tried with the feature and the Minmax normalizer you told.But then there is a slight problem with the params in normalization. I don't really know the range(Min, Max) of values the payload_score outputs and they are different for different queries.
I even tried looking at the source code to see if there is a way I can override a class so that it iterates over all the re-ranked documents and calculate Max and min there itself and pass it to MinMax normalizer class but it seems it's not possible. Your help will be really appreciated. Thanks Regards, Prateek
