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https://issues.apache.org/jira/browse/LUCENE-6837?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15093096#comment-15093096
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Christian Moen commented on LUCENE-6837:
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Hello Mike,
Yes, I'd like to backport this to 5.5.
> Add N-best output capability to JapaneseTokenizer
> -------------------------------------------------
>
> Key: LUCENE-6837
> URL: https://issues.apache.org/jira/browse/LUCENE-6837
> Project: Lucene - Core
> Issue Type: Improvement
> Components: modules/analysis
> Affects Versions: 5.3
> Reporter: KONNO, Hiroharu
> Assignee: Christian Moen
> Priority: Minor
> Attachments: LUCENE-6837 for 5.4.zip, LUCENE-6837.patch,
> LUCENE-6837.patch, LUCENE-6837.patch, LUCENE-6837.patch, LUCENE-6837.patch
>
>
> Japanese morphological analyzers often generate mis-segmented tokens. N-best
> output reduces the impact of mis-segmentation on search result. N-best output
> is more meaningful than character N-gram, and it increases hit count too.
> If you use N-best output, you can get decompounded tokens (ex:
> "シニアソフトウェアエンジニア" => {"シニア", "シニアソフトウェアエンジニア", "ソフトウェア", "エンジニア"}) and
> overwrapped tokens (ex: "数学部長谷川" => {"数学", "部", "部長", "長谷川", "谷川"}),
> depending on the dictionary and N-best parameter settings.
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