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Posted to dev@lucene.apache.org by "Steve Rowe (JIRA)" <ji...@apache.org> on 2014/05/15 01:10:36 UTC
[jira] [Commented] (LUCENE-5447) StandardTokenizer should break at
consecutive chars matching Word_Break = MidLetter, MidNum and/or MidNumLet
[ https://issues.apache.org/jira/browse/LUCENE-5447?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13998249#comment-13998249 ]
Steve Rowe commented on LUCENE-5447:
------------------------------------
{quote}
bq. I converted the tests to the WordBreakTest.txt format and submitted them (along with an explanation pointing to this issue) through the Unicode.org contact form at http://www.unicode.org/reporting.html.
The message I sent is now recorded as the second email in the feedback for Proposed Update UAX #29, Unicode Text Segmentation: http://www.unicode.org/review/pri265/
{quote}
The Unicode Technical Committee emailed me today to tell me that they would be adding test cases for this problem to Unicode 8.0, but not to the upcoming 7.0 release.
> StandardTokenizer should break at consecutive chars matching Word_Break = MidLetter, MidNum and/or MidNumLet
> ------------------------------------------------------------------------------------------------------------
>
> Key: LUCENE-5447
> URL: https://issues.apache.org/jira/browse/LUCENE-5447
> Project: Lucene - Core
> Issue Type: Bug
> Components: modules/analysis
> Affects Versions: 4.6.1
> Reporter: Steve Rowe
> Assignee: Steve Rowe
> Fix For: 4.7, 5.0
>
> Attachments: LUCENE-5447-take2.patch, LUCENE-5447-test.patch, LUCENE-5447.patch, LUCENE-5447.patch
>
>
> StandardTokenizer should split all of the following sequences into two tokens each, but they are all instead kept intact and output as single tokens:
> {noformat}
> "A::B" (':' is in \p{Word_Break = MidLetter})
> "1..2", "A..B" ('.' is in \p{Word_Break = MidNumLet})
> "A.:B"
> "A:.B"
> "1,,2" (',' is in \p{Word_Break = MidNum})
> "1,.2"
> "1.,2"
> {noformat}
> Unfortunately, the word break test data released with Unicode, e.g. for Unicode 6.3 [http://www.unicode.org/Public/6.3.0/ucd/auxiliary/WordBreakTest.txt], and incorporated into a versioned Lucene test, e.g. {{WordBreakTestUnicode_6_3_0}}, doesn't cover these cases.
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