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https://issues.apache.org/jira/browse/LUCENE-7287?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15347153#comment-15347153
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Andriy Rysin commented on LUCENE-7287:
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Ok, then I'll prepare the changes as part of this ticket.

I've looked deeper into the morfologik dictionaries we have in LanguageTool and 
the Polish one has token+lemma normalized (with POS tags concatenated for each 
unique token+lemma), other dictionaries including Ukrainian have separate 
records thus token+lemma is not unique. I've sent an email to the morfologik 
guys and once I get an explanation I'll update the dictionary appropriately so 
we don't have have duplicates.

> New lemma-tizer plugin for ukrainian language.
> ----------------------------------------------
>
>                 Key: LUCENE-7287
>                 URL: https://issues.apache.org/jira/browse/LUCENE-7287
>             Project: Lucene - Core
>          Issue Type: New Feature
>          Components: modules/analysis
>            Reporter: Dmytro Hambal
>            Priority: Minor
>              Labels: analysis, language, plugin
>             Fix For: master (7.0), 6.2
>
>         Attachments: LUCENE-7287.patch, Screen Shot 2016-06-23 at 8.23.01 
> PM.png, Screen Shot 2016-06-23 at 8.41.28 PM.png
>
>
> Hi all,
> I wonder whether you are interested in supporting a plugin which provides a 
> mapping between ukrainian word forms and their lemmas. Some tests and docs go 
> out-of-the-box =) .
> https://github.com/mrgambal/elasticsearch-ukrainian-lemmatizer
> It's really simple but still works and generates some value for its users.
> More: https://github.com/elastic/elasticsearch/issues/18303



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