Re: [CLucene-dev] Minimising diversity of relevance score

[Yoav G. <yo...@so...>]

Hi All,

As I've been interested in those classes (Similarity and Scorer) - Is
there any real documentation or explanations on those classes? What's
the concept and how the values they give reflect the search rating?

YG

-----Original Message-----
From: clu...@li...
[mailto:clu...@li...] On Behalf Of
Thomas Busch
Sent: Monday, May 14, 2007 8:20 PM
To: clu...@li...; Fenton Garratt
Subject: Re: [CLucene-dev] Minimising diversity of relevance score

Hi Fenton,

as far as i know there are 2 solutions. Either write your own
scorer or write your own similarity.

Thomas.

> Hi all,
>
> I've got a Clucene index of 2.5 million documents, which contain the
> descriptive text for a bunch of associated images.
>
> Now there are three main fields which I'm allowing to be searched on,
> and am able via a MultiFieldQuery and some query time boosting to get
> these results back in the order I would like. This is so that search
> terms found in field 1 rank higher than terms found in field 2, and
> terms in field 2 rank higher than those in field 3.
>
> The problem comes when I try to perform a secondary sort on the id
field
> descending, so that the more recent stuff is shown first.
>
> The ranking of the relevance for the search is so disparate and
> fractional, that the secondary sort is rendered useless. Ideally, what
> I'd like to be able to do is reduce the relevance score to one of 3
> distinct values, depending on which field the search term was found
in.
> That way, my secondary search would make sense.
>
> I'm using Thomas Busch's perl wrapper around Clucene as well, which
will
> have a bearing on things.
>
> I feel sure this is possible, having looked at the java mailing lists,
> but needed a little more help, being a bit of a n00b to lucene.
>
> Best Regards,
>
> Fenton.
>
>
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