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From "Daniel Einspanjer" <deinspan...@gmail.com>
Subject Re: Is it possible to use a custom similarity class to cause extra terms in a field to lower score?
Date Fri, 18 May 2007 00:54:02 GMT
Oops.  I do indeed have omitNorms turned on.  I will re-read the
documentation on it and look at turning it off.

Sorry for the bother. :/

On 5/17/07, Chris Hostetter <hossman_lucene@fucit.org> wrote:
>
> : Terminator 2
> : Terminator 2: Judgment Day
> :
> : And I score them against the query +title:(Terminator 2)
>
> : Would there be some method or combination of methods in Similarity
> : that I could easily override to allow me to penalize the second item
> : because it had "unused terms"?
>
> that's what the DefaultSimilarity does, it uses the (length)norm
> information stored when the documents are indexed to know which one is a
> better match (because it matches on a shorter field)
>
> I you aren'tseeing that behavior then perhaps you turned omitNorms for
> that field, or perhaps the byte encoding is making the distinction between
> your various terms too small -- overriding the lengthNorm function and
> reindexing might help.
>
>
>
> -Hoss
>
>
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