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https://issues.apache.org/jira/browse/LUCENE-7536?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Adrien Grand resolved LUCENE-7536.
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Resolution: Fixed
Fix Version/s: 6.4
master (7.0)
> ASCIIFoldingFilterFactory.getMultiTermComponent can emit two tokens
> -------------------------------------------------------------------
>
> Key: LUCENE-7536
> URL: https://issues.apache.org/jira/browse/LUCENE-7536
> Project: Lucene - Core
> Issue Type: Bug
> Reporter: Adrien Grand
> Priority: Minor
> Fix For: master (7.0), 6.4
>
> Attachments: LUCENE-7536.patch
>
>
> My understanding is that it is a requirement for multi-term analysis to only
> normalize tokens, and not eg. remove tokens (stop filter) or add tokens (by
> tokenizing or adding synonyms). Yet
> ASCIIFoldingFilterFactory.getMultiTermComponent will return a factory that
> emits synonyms if preserveOriginal is set to true on the original filter.
> This looks like a bug to me but I'm not entirely sure how to fix it. Should
> the multi-term analysis component do ascii folding or not if the original
> factory has preserveOriginal set to true?
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