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Date: Sat, 24 Apr 2010 12:19:49 -0400 (EDT)
From: "Uwe Schindler (JIRA)" <jira@apache.org>
To: dev@lucene.apache.org
Subject: [jira] Commented: (LUCENE-2414) add icu-based tokenizer for unicode
 text segmentation
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    [ https://issues.apache.org/jira/browse/LUCENE-2414?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12860538#action_12860538 ] 

Uwe Schindler commented on LUCENE-2414:
---------------------------------------

Looks good! Will test again later!

> add icu-based tokenizer for unicode text segmentation
> -----------------------------------------------------
>
>                 Key: LUCENE-2414
>                 URL: https://issues.apache.org/jira/browse/LUCENE-2414
>             Project: Lucene - Java
>          Issue Type: New Feature
>          Components: contrib/*
>    Affects Versions: 3.1
>            Reporter: Robert Muir
>             Fix For: 3.1
>
>         Attachments: LUCENE-2414.patch, LUCENE-2414.patch, LUCENE-2414.patch, LUCENE-2414.patch
>
>
> I pulled out the last part of LUCENE-1488, the tokenizer itself and cleaned it up some.
> The idea is simple:
> * First step is to divide text into writing system boundaries (scripts)
> * You supply an ICUTokenizerConfig (or just use the default) which lets you tailor segmentation on a per-writing system basis.
> * This tailoring can be any BreakIterator, so rule-based or dictionary-based or your own.
> The default implementation (if you do not customize) is just to do UAX#29, but with tailorings for stuff with no clear word division:
> * Thai (uses dictionary-based word breaking)
> * Khmer, Myanmar, Lao (uses custom rules for syllabification)
> Additionally as more of an example i have a tailoring for hebrew that treats the punctuation special. (People have asked before
> for ways to make standardanalyzer treat dashes differently, etc)

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