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From Erick Erickson <>
Subject Re: range of scores : queryNorm()
Date Mon, 22 Feb 2010 15:32:56 GMT
Could you back up a step and tell us what the upper-level
task you're trying to accomplish is? That is, why the partner
wants the number?

Because the raw score in Lucene is only relevant within that
single query, and then only for ranking. The normalized score
*is* in a fixed range already, between 0 and 1. Would it serve
to just modify that and send it back to the partner?


On Mon, Feb 22, 2010 at 5:26 AM, Smith G <> wrote:

> Hello ,
>          I have observed that even if we change boosting
> drastically, scores are being normalized at the end because of
> queryNorm value. Is there anything ( regarding to the queryNorm) that
> we can rely on ? like score will always be under 10 or some fixed
> value ? The main objective is to provide scores in a fixed range to
> the partner. So have you been experienced anything like this? Is it
> possible to do so ?.
>   Have you been experienced any strange situation like for a
> particular query, result scores were really high compared to routine?
> if yes,I would like to know  the factor that effected scores
> drastically, because it may help me to proceed or understand the
> cases.
> Thanks
> (NOTE : I am sorry, I have also posted in solr group, there were no
> replies and also I feel this place is even more apt.).
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