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https://issues.apache.org/jira/browse/LUCENE-9929?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Jan Høydahl updated LUCENE-9929:
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Description:
The ScandinavianNormalizationFilter applies foldings for aa, ao, ae, oe and oo.
But all those five do not make sense for both Norwegian, Swedish and Danish.
Implement an optional configuration option where users can select which of them
to apply. I.e. for Norwegian, a user would then configure (in Solr):
{code:java}
<filter class="solr.ScandinavianNormalizationFilterFactory foldings="ae,oe,aa"/>
{code}
This would activate foldings for ae->æ, oe->ø, aa->å, but not oo->o and ao->a.
The default will be to activate all five as before, so it will be backward
compatible.
was:
The ScandinavianNormalizationFilter applies foldings for aa, ao, ae, oe and oo.
But all those five do not make sense for both Norwegian, Swedish and Danish.
Implement a configuration option where users can select which of them to apply.
I.e. for Norwegian, a user would then configure (in Solr):
{code:java}
<filter class="solr.ScandinavianNormalizationFilterFactory foldings="ae,oe,aa"/>
{code}
This would activate foldings for ae->æ, oe->ø, aa->å, but not oo->o and ao->a.
> Make ScandinavianNormalizationFilter configurable wrt foldings
> --------------------------------------------------------------
>
> Key: LUCENE-9929
> URL: https://issues.apache.org/jira/browse/LUCENE-9929
> Project: Lucene - Core
> Issue Type: Improvement
> Components: modules/analysis
> Reporter: Jan Høydahl
> Assignee: Jan Høydahl
> Priority: Major
>
> The ScandinavianNormalizationFilter applies foldings for aa, ao, ae, oe and
> oo. But all those five do not make sense for both Norwegian, Swedish and
> Danish. Implement an optional configuration option where users can select
> which of them to apply. I.e. for Norwegian, a user would then configure (in
> Solr):
> {code:java}
> <filter class="solr.ScandinavianNormalizationFilterFactory
> foldings="ae,oe,aa"/>
> {code}
> This would activate foldings for ae->æ, oe->ø, aa->å, but not oo->o and ao->a.
> The default will be to activate all five as before, so it will be backward
> compatible.
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