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