: I guess I don't really understand this comment in the similarity java doc : then: : : http://lucene.apache.org/java/2_4_0/api/org/apache/lucene/search/Similarity.html#formula_queryNorm : : *queryNorm(q) * is a normalizing factor used to make scores between queries : comparable.
that comment should probably be removed ... in situations where you deal with simple query types, and matching query structures, the queryNorm *can* be used to make scores semi-comparable. To be 100% correct about what the queryNorm does in all cases: it normalizes each of the constituent values that are used in the score computation relative to the other constituent values. the main value I've seen from it is that it prevents a loss of floating point accuracy that can result from addition/multiplication of large values. -Hoss --------------------------------------------------------------------- To unsubscribe, e-mail: java-user-unsubscr...@lucene.apache.org For additional commands, e-mail: java-user-h...@lucene.apache.org
