[jira] [Created] (LUCENE-5447) StandardTokenizer should break at consecutive chars matching Word_Break = MidLetter, MidNum and/or MidNumLet

["Steve Rowe (JIRA)" <ji...@apache.org>]

Steve Rowe created LUCENE-5447:
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             Summary: 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


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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