[
https://issues.apache.org/jira/browse/LUCENE-8966?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16925588#comment-16925588
]
Jim Ferenczi commented on LUCENE-8966:
--------------------------------------
I don't think it's a bug [~danmuzi] or at least that it's related to this
issue. In your example the first dot ('.' is a word dictionary) is considered a
better path than grouping all dots eagerly. We process the unknown words
greedily so we compare the path "[4], [.], [.....]" with "[4], [.], [.],
[....]", "[4], [.], [.], [.], [...]", ... "[4], [......]". Keeping the first
dot separated from the rest indicates that a number followed by a dot is a
better splitting path than multiple dots in our model. We can discuss this
behavior in a new issue if you think this should be configurable (for instance
the JapaneseTokenizer process unknown words greedily only in search mode) ?
> KoreanTokenizer should split unknown words on digits
> ----------------------------------------------------
>
> Key: LUCENE-8966
> URL: https://issues.apache.org/jira/browse/LUCENE-8966
> Project: Lucene - Core
> Issue Type: Improvement
> Reporter: Jim Ferenczi
> Priority: Minor
> Attachments: LUCENE-8966.patch, LUCENE-8966.patch
>
>
> Since https://issues.apache.org/jira/browse/LUCENE-8548 the Korean tokenizer
> groups characters of unknown words if they belong to the same script or an
> inherited one. This is ok for inputs like Мoscow (with a Cyrillic М and the
> rest in Latin) but this rule doesn't work well on digits since they are
> considered common with other scripts. For instance the input "44사이즈" is kept
> as is even though "사이즈" is part of the dictionary. We should restore the
> original behavior and splits any unknown words if a digit is followed by
> another type.
> This issue was first discovered in
> [https://github.com/elastic/elasticsearch/issues/46365]
--
This message was sent by Atlassian Jira
(v8.3.2#803003)
---------------------------------------------------------------------
To unsubscribe, e-mail: dev-unsubscr...@lucene.apache.org
For additional commands, e-mail: dev-h...@lucene.apache.org
