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From Paul Elschot <paul.elsc...@xs4all.nl>
Subject Re: theoretical maximum score
Date Sat, 17 May 2008 07:18:45 GMT
Op Saturday 17 May 2008 00:04:31 schreef Chris Hostetter:
> : Is it possible to compute a theoretical maximum score for a given
> : query if constraints are placed on 'tf' and 'lengthNorm'? If so,
> : scores could be compared to a 'perfect score' (a feature request
> : from our customers)
 
I think a theoretical maximum score is only going to work when that
maximum applies to queries of any structure. So, start with the
simplest query, associate it with a theoretical maximum score, and
then for each possible combination of subqueries ((weighted)
and/or/phrase/span) make sure that the subscore values are
combined into another value that has the same theoretical
maximum.

Have a look here to start:
https://issues.apache.org/jira/browse/LUCENE-293

Regards,
Paul Elschot

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