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From "Robert Muir (JIRA)" <j...@apache.org>
Subject [jira] Commented: (LUCENE-1702) Thai token type() bug
Date Fri, 19 Jun 2009 16:00:09 GMT

    [ https://issues.apache.org/jira/browse/LUCENE-1702?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12721840#action_12721840
] 

Robert Muir commented on LUCENE-1702:
-------------------------------------

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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