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https://issues.apache.org/jira/browse/LUCENE-1390?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12653045#action_12653045
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Andi Vajda commented on LUCENE-1390:
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This class includes all of ISOLatin1AccentFilter.
Still, a difference in behaviour could be seen when using the new
filter with characters getting converted now that didn't before.
If that sort of lack of backwards compatibility is something we don't want
to impose on the 3.0 release then the ISOLatin1AccentFilter class needs to
be preserved.
Thanks for volunteering to finalize this bug !
> add ISOLatinAccentFilter and deprecate ISOLatin1AccentFilter
> ------------------------------------------------------------
>
> Key: LUCENE-1390
> URL: https://issues.apache.org/jira/browse/LUCENE-1390
> Project: Lucene - Java
> Issue Type: Improvement
> Components: Analysis
> Environment: any
> Reporter: Andi Vajda
> Assignee: Mark Miller
> Priority: Minor
> Fix For: 2.9
>
> Attachments: ASCIIFoldingFilter.patch, ASCIIFoldingFilter.patch,
> ISOLatinAccentFilter.java
>
>
> The ISOLatin1AccentFilter is removing accents from accented characters in the
> ISO Latin 1 character set.
> It does what it does and there is no bug with it.
> It would be nicer, though, if there was a more comprehensive version of this
> code that included not just ISO-Latin-1 (ISO-8859-1) but the entire Latin 1
> and Latin Extended A unicode blocks.
> See: http://en.wikipedia.org/wiki/Latin-1_Supplement_unicode_block
> See: http://en.wikipedia.org/wiki/Latin_Extended-A_unicode_block
> That way, all languages using roman characters are covered.
> A new class, ISOLatinAccentFilter is attached. It is intended to supercede
> ISOLatin1AccentFilter which should get deprecated.
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