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https://issues.apache.org/jira/browse/LUCENE-1896?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12752530#action_12752530
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Grant Ingersoll commented on LUCENE-1896:
-----------------------------------------
I know the queryNorm was based on some long ago research on it, but I don't
know that it has proven to be all that useful. There are certainly others who
have done work on this, too. In the end, I don't think the current
implementation is all that useful and we could likely save a few ops by
removing it, or giving people more powerful ways of changing it.
The bottom line, I think, is you shouldn't compare scores across queries.
Often times, you can't even compare scores for the same query if the underlying
index changed. I also don't understand Marvin's comment about "completeness in
the implementation of cosine similarity" nor the comment about scores being
"closer together than farther apart".
> Modify confusing javadoc for queryNorm
> --------------------------------------
>
> Key: LUCENE-1896
> URL: https://issues.apache.org/jira/browse/LUCENE-1896
> Project: Lucene - Java
> Issue Type: Improvement
> Components: Javadocs
> Reporter: Jiri Kuhn
> Priority: Minor
> Fix For: 2.9
>
>
> See http://markmail.org/message/arai6silfiktwcer
> The javadoc confuses me as well.
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