[ https://issues.apache.org/jira/browse/LUCENE-5013?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Jan Høydahl reassigned LUCENE-5013: ----------------------------------- Assignee: Jan Høydahl > ScandinavianInterintelligableASCIIFoldingFilter > ----------------------------------------------- > > Key: LUCENE-5013 > URL: https://issues.apache.org/jira/browse/LUCENE-5013 > Project: Lucene - Core > Issue Type: New Feature > Components: modules/analysis > Affects Versions: 4.3 > Reporter: Karl Wettin > Assignee: Jan Høydahl > Priority: Trivial > Attachments: LUCENE-5013-2.txt, LUCENE-5013-3.txt, LUCENE-5013-4.txt, > LUCENE-5013-5.txt, LUCENE-5013-6.txt, LUCENE-5013.patch, LUCENE-5013.txt > > > This filter is an augmentation of output from ASCIIFoldingFilter, > it discriminate against double vowels aa, ae, ao, oe and oo, leaving just the > first one. > blåbærsyltetøj == blåbärsyltetöj == blaabaarsyltetoej == blabarsyltetoj > räksmörgås == ræksmørgås == ræksmörgaos == raeksmoergaas == raksmorgas > Caveats: > Since this is a filtering on top of ASCIIFoldingFilter äöåøæ already has been > folded down to aoaoae when handled by this filter it will cause effects such > as: > bøen -> boen -> bon > åene -> aene -> ane > I find this to be a trivial problem compared to not finding anything at all. > Background: > Swedish åäö is in fact the same letters as Norwegian and Danish åæø and thus > interchangeable in when used between these languages. They are however folded > differently when people type them on a keyboard lacking these characters and > ASCIIFoldingFilter handle ä and æ differently. > When a Swedish person is lacking umlauted characters on the keyboard they > consistently type a, a, o instead of å, ä, ö. Foreigners also tend to use a, > a, o. > In Norway people tend to type aa, ae and oe instead of å, æ and ø. Some use > a, a, o. I've also seen oo, ao, etc. And permutations. Not sure about Denmark > but the pattern is probably the same. > This filter solves that problem, but might also cause new. -- This message is automatically generated by JIRA. If you think it was sent incorrectly, please contact your JIRA administrators For more information on JIRA, see: http://www.atlassian.com/software/jira --------------------------------------------------------------------- To unsubscribe, e-mail: dev-unsubscr...@lucene.apache.org For additional commands, e-mail: dev-h...@lucene.apache.org