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From "Doron Cohen (JIRA)" <>
Subject [jira] Commented: (LUCENE-1896) Modify confusing javadoc for queryNorm
Date Thu, 10 Sep 2009 23:25:57 GMT


Doron Cohen commented on LUCENE-1896:

I kinda like the modification of queryNorm to get Weight as parameter.
And I don't mind about it throwing an exception - besides being perhaps redundant, is it a
real problem?
But in any case, perhaps this part (modifying the API) belongs to a separate issue?

Back to the original queryNorm discussion, thanks Mark and Hoss for the explanations - I just
realized I did not fully understand the use of query norm. (Now I think I do, but I thought
so too before this discussion.... :)) 

I am working on a patch to the large javadoc part in the top of Similarity - to show more
tightly how the scoring formula described there today (which I think is accurate) evolves
from VSM - something in the lines of Mark's description above. I hope to complete it over
the weekend, and I hope the added text would also clear the confusion about the purpose and
practice of the query norm.

> Modify confusing javadoc for queryNorm
> --------------------------------------
>                 Key: LUCENE-1896
>                 URL:
>             Project: Lucene - Java
>          Issue Type: Improvement
>          Components: Javadocs
>            Reporter: Jiri Kuhn
>            Priority: Minor
>             Fix For: 2.9
>         Attachments: LUCENE-1896.patch, queryNormAlternate.patch
> See
> The javadoc confuses me as well.

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