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From Grant Ingersoll <gsing...@apache.org>
Subject Re: [jira] Commented: (LUCENE-1534) idf(t) is not actually squared during scoring?
Date Tue, 03 Feb 2009 21:59:13 GMT
We should probably have that discussion (changing default Sim) on java- 
dev, not on a particular JIRA issue.  I, for one, am interested in  
having the discussion.


On Feb 3, 2009, at 3:35 PM, Doug Cutting (JIRA) wrote:

>
>    [ https://issues.apache.org/jira/browse/LUCENE-1534?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12670103

> #action_12670103 ]
>
> Doug Cutting commented on LUCENE-1534:
> --------------------------------------
>
> Now, on the cusp of 3.0, might be a good time to think about  
> changing the default ranking algorithm.  This is potentially a  
> disruptive change, but we can easily provide a back-compatible  
> Similarity implementation.  Are there other changes to the default  
> Similarity that may be of general utility?  Or do folks thinks its  
> better to leave this alone?
>
>> idf(t) is not actually squared during scoring?
>> ----------------------------------------------
>>
>>                Key: LUCENE-1534
>>                URL: https://issues.apache.org/jira/browse/LUCENE-1534
>>            Project: Lucene - Java
>>         Issue Type: Bug
>>         Components: Query/Scoring
>>   Affects Versions: 2.1, 2.2, 2.3, 2.3.1, 2.3.2, 2.4
>>           Reporter: Michael McCandless
>>           Assignee: Michael McCandless
>>           Priority: Minor
>>            Fix For: 2.9
>>
>>
>> The javadocs for Similarity:
>>  http://lucene.apache.org/java/2_4_0/api/org/apache/lucene/search/Similarity.html
>> show idf(t) as being squared when computing net query score.  But I
>> don't think it is actually squared, in looking at the sources?  Maybe
>> it used to be, eg this interesting discussion:
>>  http://markmail.org/message/k5pl7scmiac5wosb
>> Or am I missing something?  We just need to fix the javadocs to take
>> away the "squared"...
>
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