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https://issues.apache.org/jira/browse/LUCENE-1702?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12721840#action_12721840
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Robert Muir commented on LUCENE-1702:
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Steven I have been watching that jflex 1.5 branch with great anticipation :)
Do you think it will support characters outside of the BMP?
(My hope is that it might perform better than the ICU RBBI for some other
things I am working on)
> Thai token type() bug
> ---------------------
>
> Key: LUCENE-1702
> URL: https://issues.apache.org/jira/browse/LUCENE-1702
> Project: Lucene - Java
> Issue Type: Bug
> Components: contrib/analyzers
> Reporter: Robert Muir
> Priority: Minor
>
> While adding tests for offsets & type to ThaiAnalyzer, i discovered it does
> not type Thai numeric digits correctly.
> ThaiAnalyzer uses StandardTokenizer, and this is really an issue with the
> grammar, which adds the entire [:Thai:] block to ALPHANUM.
> i propose that alphanum be described a little bit differently in the grammar.
> Instead, [:letter:] should be allowed to have diacritics/signs/combining
> marks attached to it.
> this would allow the [:thai:] hack to be completely removed, would allow
> StandardTokenizer to parse complex writing systems such as Indian languages,
> and would fix LUCENE-1545.
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