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From Michael McCandless <>
Subject Re: boost and score doubt
Date Tue, 07 Apr 2009 09:02:56 GMT
Negative boosts are accepted, though rather "unusual".  Also note that
Lucene by default filters out any hits with scores <= 0.0.

Normally you'd set boost to something > 0.0 (0.1 should work).

What unexpected effect are you seeing?

If you omit norms, then indeed your per-doc boost (and per-field
boost, if used) are discarded (have no effect).


On Mon, Apr 6, 2009 at 4:01 PM, Marc Sturlese <> wrote:
> Hey there,
> Does de function doc.setBoost(x.y) accept negative values or values minor
> than 1?? I mean... it compile and doesn't give errors but the behabiour is
> not exactly what I was expecting.
> In my use case I have the field title... I want to give very very low
> relevance to the documents witch title has less that 40 characters. I have
> tried setting boost to negatives values or to 0.1
> Wich is the best way to do that?
> Is there any range of values for setting boost?
> And another thing that confuses me...  if I omit norms is the score
> function... how does it affect to the boosting I am setting? does it loose
> the effect?
> Thanks in advance!
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