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https://issues.apache.org/jira/browse/SOLR-13751?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17176385#comment-17176385
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ASF subversion and git services commented on SOLR-13751:
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Commit 1145362a248aea6ea56189c10279a23efd3e988a in lucene-solr's branch
refs/heads/branch_8x from andywebb1975
[ https://gitbox.apache.org/repos/asf?p=lucene-solr.git;h=1145362 ]
SOLR-13751: add BooleanSimilarityFactory (#867)
> Add BooleanSimilarityFactory to Solr
> ------------------------------------
>
> Key: SOLR-13751
> URL: https://issues.apache.org/jira/browse/SOLR-13751
> Project: Solr
> Issue Type: New Feature
> Reporter: Andy Webb
> Priority: Minor
> Time Spent: 40m
> Remaining Estimate: 0h
>
> Solr doesn't expose Lucene's BooleanSimilarity (ref LUCENE-5867) so it's not
> available for use in situations where BM25/TDF-IF are not useful. (Fields
> using this similarity will likely also set omitNorms and
> omitTermFreqAndPositions to true.)
> Our use case is ngram-driven suggestions, where the frequency of occurrence
> of a particular sequence of characters is not something users would expect to
> be taken into account when ordering suggestions.
>
> Here's my PR: [https://github.com/apache/lucene-solr/pull/867] (I'm at
> Activate if anyone would like to talk this through in person.)
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