add ISOLatinAccentFilter and deprecate ISOLatin1AccentFilter
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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
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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