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https://issues.apache.org/jira/browse/LUCENE-9581?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17218066#comment-17218066
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Jun Ohtani commented on LUCENE-9581:
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+1 for reconsidering the behavior of the search mode.
> Clarify discardCompoundToken behavior in the JapaneseTokenizer
> --------------------------------------------------------------
>
> Key: LUCENE-9581
> URL: https://issues.apache.org/jira/browse/LUCENE-9581
> Project: Lucene - Core
> Issue Type: Bug
> Reporter: Jim Ferenczi
> Priority: Minor
> Attachments: LUCENE-9581.patch
>
>
> At first sight, the discardCompoundToken option added in LUCENE-9123 seems
> redundant with the NORMAL mode of the Japanese tokenizer. When set to true,
> the current behavior is to disable the decomposition for compounds, that's
> exactly what the NORMAL mode does.
> So I wonder if the right semantic of the option would be to keep only the
> decomposition of the compound or if it's really needed. If the goal is to
> make the output compatible with a graph token filter, the current workaround
> to set the mode to NORMAL should be enough.
> That's consistent with the mode that should be used to preserve positions in
> the index since we don't handle position length on the indexing side.
> Am I missing something regarding the new option ? Is there a compelling case
> where it differs from the NORMAL mode ?
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