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From "Yuval Feinstein (JIRA)" <j...@apache.org>
Subject [jira] Commented: (LUCENE-2091) Add BM25 Scoring to Lucene
Date Mon, 22 Mar 2010 10:14:28 GMT

    [ https://issues.apache.org/jira/browse/LUCENE-2091?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12848076#action_12848076
] 

Yuval Feinstein commented on LUCENE-2091:
-----------------------------------------

Hi Katja.
I am adding this to my task list.
I hope to get around to it in a few days.
In the meantime, I suggest you try replacing the instance method call
this.getSimilarity().decodeNormValue() 
by the static method 
Similarity.decodeNorm()

Please let me know if it works; If it does, I will change the patch accordingly.


> Add BM25 Scoring to Lucene
> --------------------------
>
>                 Key: LUCENE-2091
>                 URL: https://issues.apache.org/jira/browse/LUCENE-2091
>             Project: Lucene - Java
>          Issue Type: New Feature
>          Components: contrib/*
>            Reporter: Yuval Feinstein
>            Priority: Minor
>             Fix For: 3.1
>
>         Attachments: LUCENE-2091.patch, persianlucene.jpg
>
>   Original Estimate: 48h
>  Remaining Estimate: 48h
>
> http://nlp.uned.es/~jperezi/Lucene-BM25/ describes an implementation of Okapi-BM25 scoring
in the Lucene framework,
> as an alternative to the standard Lucene scoring (which is a version of mixed boolean/TFIDF).
> I have refactored this a bit, added unit tests and improved the runtime somewhat.
> I would like to contribute the code to Lucene under contrib. 

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