Github user javanna commented on a diff in the pull request: https://github.com/apache/lucene-solr/pull/511#discussion_r237392120 --- Diff: lucene/MIGRATE.txt --- @@ -150,3 +150,11 @@ in order to support ToParent/ToChildBlockJoinQuery. Normalization is now type-safe, with CharFilterFactory#normalize() returning a Reader and TokenFilterFactory#normalize() returning a TokenFilter. + +## k1+1 constant factor removed from BM25 similarity numerator + +Scores computed by the BM25 similarity are lower than previously as the k1+1 +constant factor was removed from the numerator of the scoring formula. +Ordering of results is preserved unless scores are computed from multiple +fields using different similarities. The previous behaviour is now exposed +through the LegacyBM25Similarity class. --- End diff -- yes I wasn't sure how to phrase that. Will add.
--- --------------------------------------------------------------------- To unsubscribe, e-mail: dev-unsubscr...@lucene.apache.org For additional commands, e-mail: dev-h...@lucene.apache.org