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https://issues.apache.org/jira/browse/LUCENE-2091?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13050508#comment-13050508
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ian towey commented on LUCENE-2091:
-----------------------------------
Not sure am i using this BM25BooleanQuery correctly, getting variation in the
number of hits when testing v QueryParser. Is there limitations to the query
string that BM25BooleanQuery can deal with, e.g. "gas OR ((oil AND car) NOT
ship)", the results returned by BM25BooleanQuery seem to be the all docs that
don't contain the term "ship", (comparing BM25BooleanQuery v QueryParser)
> 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: modules/other
> 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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