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Posted to dev@lucene.apache.org by "Uwe Schindler (JIRA)" <ji...@apache.org> on 2018/06/12 19:17:00 UTC
[jira] [Commented] (LUCENE-7444) Remove StopFilter from
StandardAnalyzer in Lucene-Core
[ https://issues.apache.org/jira/browse/LUCENE-7444?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16510061#comment-16510061 ]
Uwe Schindler commented on LUCENE-7444:
---------------------------------------
+1 that's an easy change!
> Remove StopFilter from StandardAnalyzer in Lucene-Core
> ------------------------------------------------------
>
> Key: LUCENE-7444
> URL: https://issues.apache.org/jira/browse/LUCENE-7444
> Project: Lucene - Core
> Issue Type: Task
> Components: core/other, modules/analysis
> Affects Versions: 6.2
> Reporter: Uwe Schindler
> Priority: Major
>
> Yonik said on LUCENE-7318:
> {quote}
> bq. I think it would make a good default for most Lucene users, and we should graduate it from the analyzers module into core, and make it the default for IndexWriter.
> This "StandardAnalyzer" is specific to English, as it removes English stopwords.
> That seems to be an odd choice now for a few reasons:
> - It was argued in the past (rather vehemently) that Solr should not prefer english in it's default "text" field
> - AFAIK, removing stopwords is no longer considered best practice.
> Given that removal of english stopwords is the only thing that really makes this analyzer english-centric (and given the negative impact that can have on other languages), it seems like the stopword filter should be removed from StandardAnalyzer.
> {quote}
> When trying to fix the backwards incompatibility issues in LUCENE-7318, it looks like most unrelated code moved from analysis module to core (and changing package names!!!! :( ) was related to word list loading, CharArraySets, and superclasses of StopFilter. If we follow Yonik's suggestion, we can revert all those changes. I agree with hin, an "universal" analyzer should not have any language specific stop-words.
> The other thing is LowercaseFilter, but I'd suggest to simply add a clone of it to Lucene core and leave the analysis-module self-contained.
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