lucene-java-user mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From Simon Willnauer <>
Subject Re: LowerCaseFilter fails one letter (I) of Turkish alphabet
Date Mon, 30 Nov 2009 19:46:22 GMT
On Mon, Nov 30, 2009 at 8:08 PM, Robert Muir <> wrote:
>> I am not sure if it is worth to add a new TokenFilter for Turkish language.
>> I see there exist GreekLowerCaseFilter and RussianLowerCaseFilter. It would
>> be nice to see TurkishLowerCaseFilter in Lucene.
> just to clarify, GreekLowerCaseFilter really shouldn't exist either. The
> final sigma problem it has (where there are two lowercase forms depending
> upon position in word), this is also solved with unicode case folding or
> collation. This is a perfect example of how lowercase is the wrong operation
> for search.
> and RussianLowerCaseFilter is deprecated now, it does the exact same thing
> as LowerCaseFilter.
btw. we should fix supplementary chars in there too even if it is deprecated.

> --
> Robert Muir

To unsubscribe, e-mail:
For additional commands, e-mail:

View raw message