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https://issues.apache.org/jira/browse/LUCENE-7498?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15972848#comment-15972848
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Alessandro Benedetti commented on LUCENE-7498:
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[~teofili] as mentioned in the other Jira this is the patch.
It is quite big, and a summary is attached to the Pull Request.

For everyone, I would be happy to improve the patch and evaluate feedback.
Main target of this work is to introduce BM25 and improve the structure of MLT 
to make it easier to extend and maintain.


> More Like This to Use BM25
> --------------------------
>
>                 Key: LUCENE-7498
>                 URL: https://issues.apache.org/jira/browse/LUCENE-7498
>             Project: Lucene - Core
>          Issue Type: Improvement
>          Components: modules/other
>            Reporter: Alessandro Benedetti
>
> BM25 is now the default similarity, but the more like this is still using the 
> old TF/IDF .
>  
> This issue is to move to BM25 and refactor the MLT to be more organised, 
> extensible and maintainable.
> Few extensions will follow later, but the focus of this issue will be :
>  - BM25
> - code refactor + tests



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