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Posted to issues@lucene.apache.org by "Adrien Grand (Jira)" <ji...@apache.org> on 2021/11/23 17:27:00 UTC
[jira] [Commented] (LUCENE-9537) Add Indri Search Engine Functionality to Lucene
[ https://issues.apache.org/jira/browse/LUCENE-9537?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17448138#comment-17448138 ]
Adrien Grand commented on LUCENE-9537:
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I was just reviewing this work after noticing that Scorable#smoothingScore was not used, and it seems to be completely broken? All matching documents get a score of 0 since the AndScorer does `if (scorer instanceof IndriScorer)` but TermScorer is not an IndriScorer.
> 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
> Fix For: 8.9
>
> Attachments: LUCENE-9537.patch, LUCENE-INDRI.patch
>
> Time Spent: 4h 40m
> 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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