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https://issues.apache.org/jira/browse/LUCENE-2091?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12785272#action_12785272
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Robert Muir commented on LUCENE-2091:
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Uwe, yes I agree it would be nicer to do a tighter integration.
I am suggesting we tackle it one step at a time, first we can answer this
question, next we can talk about average document length and other tricky
things like that.
For this I calculate it from norms, as Doug suggested here:
https://issues.apache.org/jira/browse/LUCENE-965?focusedCommentId=12515803&page=com.atlassian.jira.plugin.system.issuetabpanels%3Acomment-tabpanel#action_12515803
, but lets get to this later.
> 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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