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From "Robert Muir (Resolved) (JIRA)" <j...@apache.org>
Subject [jira] [Resolved] (LUCENE-2906) Filter to process output of ICUTokenizer and create overlapping bigrams for CJK
Date Thu, 29 Dec 2011 05:26:31 GMT

     [ https://issues.apache.org/jira/browse/LUCENE-2906?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Robert Muir resolved LUCENE-2906.
---------------------------------

    Resolution: Fixed

Committed, maybe in the future we enable this for StandardFilter (for good CJK behavior by
default), but for now it seems good enough to have separate filters that handle the corner
cases and all of unicode.
                
> Filter to process output of ICUTokenizer and create overlapping bigrams for CJK 
> --------------------------------------------------------------------------------
>
>                 Key: LUCENE-2906
>                 URL: https://issues.apache.org/jira/browse/LUCENE-2906
>             Project: Lucene - Java
>          Issue Type: New Feature
>          Components: modules/analysis
>            Reporter: Tom Burton-West
>            Assignee: Robert Muir
>            Priority: Minor
>             Fix For: 3.6, 4.0
>
>         Attachments: LUCENE-2906.patch, LUCENE-2906.patch, LUCENE-2906.patch, LUCENE-2906.patch
>
>
> The ICUTokenizer produces unigrams for CJK. We would like to use the ICUTokenizer but
have overlapping bigrams created for CJK as in the CJK Analyzer.  This filter would take the
output of the ICUtokenizer, read the ScriptAttribute and for selected scripts (Han, Kana),
would produce overlapping bigrams.

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