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https://issues.apache.org/jira/browse/LUCENE-9537?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17275376#comment-17275376
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ASF subversion and git services commented on LUCENE-9537:
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Commit 4d839225b147a2c4d1a6d6363957b249d54bdfb4 in lucene-solr's branch
refs/heads/master from Michael McCandless
[ https://gitbox.apache.org/repos/asf?p=lucene-solr.git;h=4d83922 ]
LUCENE-9537: move to 8.9 section in CHANGES.txt; make it consistent with 8.x's
CHANGES.txt; remove the leading UTF-8 BOM
> Add Indri Search Engine Functionality to Lucene
> -----------------------------------------------
>
> Key: LUCENE-9537
> URL: https://issues.apache.org/jira/browse/LUCENE-9537
> Project: Lucene - Core
> Issue Type: Improvement
> Components: core/search
> Reporter: Cameron VandenBerg
> Priority: Major
> Labels: patch
> Attachments: LUCENE-9537.patch, LUCENE-INDRI.patch
>
> Time Spent: 4h 20m
> Remaining Estimate: 0h
>
> Indri ([http://lemurproject.org/indri.php]) is an academic search engine
> developed by The University of Massachusetts and Carnegie Mellon University.
> The major difference between Lucene and Indri is that Indri will give a
> document a "smoothing score" to a document that does not contain the search
> term, which has improved the search ranking accuracy in our experiments. I
> have created an Indri patch, which adds the search code needed to implement
> the Indri AND logic as well as Indri's implementation of Dirichlet Smoothing.
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