[jira] Commented: (LUCENE-2091) Add BM25 Scoring to Lucene

["Vinay Setty (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/LUCENE-2091?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12869064#action_12869064 ] 

Vinay Setty commented on LUCENE-2091:
-------------------------------------

@Joaquin, I want to use BM25 scoring for evaluating phrase queries, I have created a positional index in Lucene, but have no clue how to use it for evaluating phrase queries using BM25 scorer. I had a quick look at the code, by default the queries are boolean, and could not find a easy way to make it phrase query. Any ideas?

> 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: 4.0
>
>         Attachments: BM25SimilarityProvider.java, 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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