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Posted to dev@lucene.apache.org by "Ere Maijala (JIRA)" <ji...@apache.org> on 2018/01/03 10:58:00 UTC
[jira] [Created] (SOLR-11811) Support for defining a Unicode set
filter when using ICUFoldingFilter
Ere Maijala created SOLR-11811:
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Summary: Support for defining a Unicode set filter when using ICUFoldingFilter
Key: SOLR-11811
URL: https://issues.apache.org/jira/browse/SOLR-11811
Project: Solr
Issue Type: Improvement
Security Level: Public (Default Security Level. Issues are Public)
Components: Schema and Analysis
Reporter: Ere Maijala
Priority: Minor
ne a Unicode set filter, ICUFoldingFilterFactory does not support it. A filter allows one to e.g. exclude a set of characters from being folded. E.g. for Finnish and Swedish the filter could be defined like this:
<filter class="solr.ICUFoldingFilterFactory" filter="[^åäöÅÄÖ]"/>
(Note: An additional MappingCharFilterFactory for lowercasing the characters excluded from folding would be needed for perfect results.)
I'll add a patch that does this similar to ICUNormalizer2FilterFactory. Applies at least to master and branch_7x.
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