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Posted to dev@lucene.apache.org by "Dawid Weiss (JIRA)" <ji...@apache.org> on 2014/01/30 10:16:12 UTC

[jira] [Updated] (LUCENE-5421) MorfologicFilter doesn't stem legitimate uppercase terms (surnames, proper nouns, etc.)

     [ https://issues.apache.org/jira/browse/LUCENE-5421?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Dawid Weiss updated LUCENE-5421:
--------------------------------

    Summary: MorfologicFilter doesn't stem legitimate uppercase terms (surnames, proper nouns, etc.)  (was: MorfologicFilter doesn't stem properly invented names: surnames, rivers, etc.)

> MorfologicFilter doesn't stem legitimate uppercase terms (surnames, proper nouns, etc.)
> ---------------------------------------------------------------------------------------
>
>                 Key: LUCENE-5421
>                 URL: https://issues.apache.org/jira/browse/LUCENE-5421
>             Project: Lucene - Core
>          Issue Type: Bug
>          Components: modules/analysis
>    Affects Versions: 4.6.1
>            Reporter: Grzegorz Sobczyk
>            Assignee: Dawid Weiss
>            Priority: Minor
>
> Morfologic filter search stems in input or lowercase format:
> org.apache.lucene.analysis.morfologik.MorfologikFilter.incrementToken()
> {code}
> if (!keywordAttr.isKeyword() && (lookupSurfaceForm(termAtt) || lookupSurfaceForm(toLowercase(termAtt)))) {
>   [...]
> }
> {code}
> In this situation, if input token is *sienkiewicza* - it isn't stemmed
> but: *Sienkiewicza* --> *Sienkiewicz*
> for comparison:
> *pRoDuKtY* --> *produkt*
> It should stem also input token with capitalized first letter



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