ASF GitHub Bot commented on OPENNLP-1197:

kojisekig opened a new pull request #316: OPENNLP-1197: support Japanese 
letters in FeatureGeneratorUtil
URL: https://github.com/apache/opennlp/pull/316
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> FeatureGeneratorUtil.tokenFeature() always returns "lc" for Japanese words
> --------------------------------------------------------------------------
>                 Key: OPENNLP-1197
>                 URL: https://issues.apache.org/jira/browse/OPENNLP-1197
>             Project: OpenNLP
>          Issue Type: Bug
>          Components: Machine Learning
>    Affects Versions: 1.8.4
>            Reporter: Koji Sekiguchi
>            Priority: Major
> FeatureGeneratorUtil.tokenFeature() always recognizes Japanese words as "lc" 
> (lower case). It looks a bug to me because they're not lower case letters, 
> but other than that, it seems that FeatureGeneratorUtil.tokenFeature() takes 
> care only Europe/American languages.
> For example, in Japanese NER problem, typical token classes are as follows:
> - HIRA : あ, い, う, え, お etc.
> - KATA : ア, イ, ウ, エ, オ etc.
> - ALPHA : we don't need to distinguish lower/upper case
> I think it's possible that we get FeatureGeneratorUtil.tokenFeature() to have 
> additional token classes I mentioned above, but later on, someone who comes 
> from Asia and may claim similar thing.
> I'd like to make FeatureGeneratorUtil plugable, but I don't have any idea now.

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