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From "Robert Muir (JIRA)" <j...@apache.org>
Subject [jira] Commented: (LUCENE-2102) LowerCaseFilter for Turkish language
Date Tue, 01 Dec 2009 22:43:20 GMT

    [ https://issues.apache.org/jira/browse/LUCENE-2102?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12784489#action_12784489
] 

Robert Muir commented on LUCENE-2102:
-------------------------------------

Uwe, I am talking about this patch too. it is simple and can be extended to the future to
handle such things.
your mappingcharfilter approach cannot, and I don't see us having ICU in core ever, even though
I would love such a thing.

Additionally, it will make it easier to fix SnowballAnalyzer, which is currently *broken for
turkish language* because it uses the wrong lowercase.


> LowerCaseFilter for Turkish language
> ------------------------------------
>
>                 Key: LUCENE-2102
>                 URL: https://issues.apache.org/jira/browse/LUCENE-2102
>             Project: Lucene - Java
>          Issue Type: Improvement
>          Components: Analysis
>    Affects Versions: 3.0
>            Reporter: Ahmet Arslan
>            Assignee: Robert Muir
>            Priority: Minor
>             Fix For: 3.1
>
>         Attachments: LUCENE-2102.patch, LUCENE-2102.patch, LUCENE-2102.patch
>
>
> java.lang.Character.toLowerCase() converts 'I' to 'i' however in Turkish alphabet lowercase
of 'I' is not 'i'. It is LATIN SMALL LETTER DOTLESS I.

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