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https://issues.apache.org/jira/browse/LUCENE-3747?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13199985#comment-13199985
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Steven Rowe commented on LUCENE-3747:
-------------------------------------
{quote}
bq. check for any uax#29 differences (i think we are unaffected)
Right, I'm not sure about this - I plan on upgrading the JFlex test cases that
implement the uax#29 rules and test against the data Unicode.org provides. I
should know more once that's done.
{quote}
I've finished adding Unicode 6.1 versions to JFlex's UAX#29 test cases,
including the word break rules test case, and the only change I noticed that
could conceivably affect Lucene's UAX#29 tokenizers is the new Section 8, which
discusses Korean syllables. Since the rules listed in that section are not
part of the word break rules, but rather are a tailoring, and since that
section says "All standard Korean syllable blocks used in modern Korean are of
the form <L V T> or <L V> and have equivalent, single-character precomposed
forms.", I don't think we need to support this (right now anyway).
(By contrast, the UAX#14 line break rules changed significantly between Unicode
v6.0 and v6.1, and I'm still working to include a Unicode 6.1 version to
JFlex's corresponding test case.)
> Support Unicode 6.1.0
> ---------------------
>
> Key: LUCENE-3747
> URL: https://issues.apache.org/jira/browse/LUCENE-3747
> Project: Lucene - Java
> Issue Type: Improvement
> Components: modules/analysis
> Affects Versions: 3.5, 4.0
> Reporter: Steven Rowe
> Priority: Minor
>
> Now that Unicode 6.1.0 has been released, Lucene/Solr should support it.
> JFlex trunk now supports Unicode 6.1.0.
> Tasks include:
> * Upgrade ICU4J to v49 (after it's released, on 2012-03-21, according to
> http://icu-project.org).
> * Use {{icu}} module tools to regenerate the supplementary character
> additions to JFlex grammars.
> * Version the JFlex grammars: copy the current implementations to
> {{*Impl3<X>}}; cause the versioning tokenizer wrappers to instantiate this
> version when the {{Version}} c-tor param is in the range 3.1 to the version
> in which these changes are released (excluding the range endpoints); then
> change the specified Unicode version in the non-versioned JFlex grammars from
> 6.0 to 6.1.
> * Regenerate JFlex scanners, including {{StandardTokenizerImpl}},
> {{UAX29URLEmailTokenizerImpl}}, and {{HTMLStripCharFilter}}.
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