Folding of accented to non-accented *only* — leaving symbols

I now the asciifolding filter docs are really very clear on this, but it
took me an embarrassingly long time to realise I was losing my currency
symbol (£) to the ASCII folding filter.

Other than creating my own character map with the char map filter, does
there exist something of production quality that would translate accented
UTF8 characters of the Latin-alphabet into non-accented characters in the
ASCII range?

TIA
Lee

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You are probably looking for ICU Folding which is part of ICU plugin:
https://github.com/elasticsearch/elasticsearch-analysis-icu . It's not
explained in details on that page, but you can see a long list of
normalizations from the Lucene's Javadoc:
http://www.solr-start.com/javadoc/solr-lucene/org/apache/lucene/analysis/icu/ICUFoldingFilter.html

Overall, the explanation language is a little hairy and you may need
to chase through the Unicode pages, but it should be the
production-ready approach in the end.

Regards,
Alex.

On 13 October 2014 15:30, Lee Gee leegee@gmail.com wrote:

I now the asciifolding filter docs are really very clear on this, but it
took me an embarrassingly long time to realise I was losing my currency
symbol (£) to the ASCII folding filter.

Other than creating my own character map with the char map filter, does
there exist something of production quality that would translate accented
UTF8 characters of the Latin-alphabet into non-accented characters in the
ASCII range?

TIA
Lee

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