Hi, I am trying to understand how Nutch computes score for each document. I could figure out how tf, idf and queryNorm are computed but I do not understand how fieldNorm (normalisation for each field) value is computed. It seems to be a magic number for me and this is where Nutch seems to differ from Lucene in computing score. Also Nutch assigns different boosts for different fields (e.g, 4.0 for url field) and uses this value while computing queryWeight. Can anyone explain these please?
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