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From "Paul Elschot (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (LUCENE-7580) Spans tree scoring
Date Sun, 04 Dec 2016 14:56:58 GMT

    [ https://issues.apache.org/jira/browse/LUCENE-7580?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15720073#comment-15720073
] 

Paul Elschot commented on LUCENE-7580:
--------------------------------------


Some related issues, thanks for these discussions:

LUCENE-533
LUCENE-2878
LUCENE-2879
LUCENE-2880
LUCENE-6371
LUCENE-6466
LUCENE-7398


Some related web pages:

http://www.gossamer-threads.com/lists/lucene/java-user/33902 March 2006.

http://www.gossamer-threads.com/lists/lucene/java-user/53027 September 2007, suggests to:
"recurse the spans tree to compose a score based on the type of subqueries (near, and, or,
not) and what matched."

http://www.gossamer-threads.com/lists/lucene/java-user/60103 April 2008.

http://www.flax.co.uk/blog/2016/04/26/can-make-contribution-apache-solr-core-development/
see point 4.

How to use BM25:
http://opensourceconnections.com/blog/2015/10/16/bm25-the-next-generation-of-lucene-relevation/



> Spans tree scoring
> ------------------
>
>                 Key: LUCENE-7580
>                 URL: https://issues.apache.org/jira/browse/LUCENE-7580
>             Project: Lucene - Core
>          Issue Type: Improvement
>          Components: core/search
>    Affects Versions: master (7.0)
>            Reporter: Paul Elschot
>            Priority: Minor
>             Fix For: 6.x
>
>         Attachments: LUCENE-7580.patch
>
>
> Recurse the spans tree to compose a score based on the type of subqueries and what matched



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