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https://issues.apache.org/jira/browse/LUCENE-2102?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12784496#action_12784496
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Uwe Schindler edited comment on LUCENE-2102 at 12/1/09 10:54 PM:
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Robert: I understand your problem, but it affects LowerCaseFilter at all and is
not special to the Turkish lower filter. If you have decomposed characters even
LowerCaseFilter would fail for *all* languages (even German if you compose ä
out of a and two dots). In germany really nobody uses composed chars, I do not
know how this is in Turkey, but the last time I was there, they just used the
simpliest de-composed chars (like germans), they even have the umlauts which
they use from the basic latin1 range. And for that this filter works and is a
quick fix.
But I give up now.
was (Author: thetaphi):
Robert: I understand your problem, but it affects LowerCaseFilter at all
and is not special to the Turkish lower filter. If you have decomposed
characters even LowerCaseFilter would fail for *all* languages (even German if
you compose ä out of a and two dots). In germany really nobody uses composed
chars, I do not know how this is in Turkey, but the last time I was there, they
just used the simpliest composed chars (like germans), they even have the
umlauts which they use from the basic latin1 range. And for that this filter
works and is a quick fix.
But I give up now.
> 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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