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https://issues.apache.org/jira/browse/LUCENE-10157?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17434372#comment-17434372
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Cameron VandenBerg commented on LUCENE-10157:
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Hi [~cpoerschke]! Thanks for your response! I would be happy to create a pull
request, and I will make sure to add tests for the new queries.
> Add Additional Indri Search Engine Functionality to Lucene
> ----------------------------------------------------------
>
> Key: LUCENE-10157
> URL: https://issues.apache.org/jira/browse/LUCENE-10157
> Project: Lucene - Core
> Issue Type: New Feature
> Components: core/queryparser, core/search
> Reporter: Cameron VandenBerg
> Priority: Major
> Attachments: LUCENE-10157.patch
>
>
> In Jira issue LUCENE-9537, basic functionality from the Indri search engine
> ([http://lemurproject.org/indri.php]) was added to Lucene. With that
> functionality in place, we would love to build upon that to add additional
> Indri queries and an Indri query parser to Lucene to broaden the Indri
> functionality within Lucene. In this patch, I have added the Indri NOT, the
> INDRI OR, and the Indri WeightedSum functionality. I have also included an
> IndriQueryParser for accessing this functionality. More information on these
> query operators can be seen here:
> [https://sourceforge.net/p/lemur/wiki/Belief%20Operations/] and here:
> [https://sourceforge.net/p/lemur/wiki/Indri%20Query%20Language%20Reference/.|https://sourceforge.net/p/lemur/wiki/Indri%20Query%20Language%20Reference/]
>
> I would be very excited to work with the Lucene community again to try to add
> this functionality. I am open to suggestions, and I am happy to make any
> changes that might be suggested. Thank you!
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