In a word, no. At least not that I've heard of. "normalizing scores" is one of those things that sounds reasonable on the surface, but is really meaningless. Scores don't really _tell_ you anything about the abstract "goodness" of a doc, they just tell you that doc1 is likely better than doc2 _within a single query_. You can't even compare scores in the _same_ index across two different queries.
At its lowest level, say one index has 1,000,000 occurrences of "erick", while index 2 has exactly 1. Term frequency is one of the numbers that is used to calculate the score. How does one normalize the part of the calculation resulting from matching "erick" between the two indexes? Anything you do is wrong. Similarly, expecting documents to be returned in a particular order because of boosting is not going to be satisfactory. Boosting will influence the final score and thus the position of the document, but not absolutely order them unless you put in insane boosts. Tests based on boosting and doc ordering will be very fragile I'd guess. Best, Erick On Thu, Oct 22, 2015 at 8:34 AM, Bauer, Herbert S. (Scott) <bauer.sc...@mayo.edu> wrote: > We have a test case that boosts a set of terms. Something along the lines of > “term1^2 AND term2^3 AND term3^4 and this query runs over a two content > distinct indexes. Our expectation is that the terms would be returned to us > as term3, term2 and term1. Instead we get something along the lines of > term3, term1 and term2. I realize from a number of postings that this is the > result of the scoring methods action taking place within an individual index > rather than against several indexes. At the same time I don’t see a lot of > solutions offered. Is there an out of the box solution to normalize scoring > over diverse indexes? If not is there a strategy for rolling your own > normalizing solution? I’m assuming this has to be a common problem. -scott > --------------------------------------------------------------------- To unsubscribe, e-mail: java-user-unsubscr...@lucene.apache.org For additional commands, e-mail: java-user-h...@lucene.apache.org
