[
https://issues.apache.org/jira/browse/LUCENE-3726?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Robert Muir resolved LUCENE-3726.
---------------------------------
Resolution: Fixed
Fix Version/s: 4.0
3.6
Assignee: Robert Muir
Thanks Christian: I committed this.
> Default KuromojiAnalyzer to use search mode
> -------------------------------------------
>
> Key: LUCENE-3726
> URL: https://issues.apache.org/jira/browse/LUCENE-3726
> Project: Lucene - Java
> Issue Type: Improvement
> Affects Versions: 3.6, 4.0
> Reporter: Robert Muir
> Assignee: Robert Muir
> Fix For: 3.6, 4.0
>
> Attachments: LUCENE-3726.patch, LUCENE-3726.patch, LUCENE-3726.patch,
> kuromojieval.tar.gz
>
>
> Kuromoji supports an option to segment text in a way more suitable for search,
> by preventing long compound nouns as indexing terms.
> In general 'how you segment' can be important depending on the application
> (see http://nlp.stanford.edu/pubs/acl-wmt08-cws.pdf for some studies on this
> in chinese)
> The current algorithm punishes the cost based on some parameters
> (SEARCH_MODE_PENALTY, SEARCH_MODE_LENGTH, etc)
> for long runs of kanji.
> Some questions (these can be separate future issues if any useful ideas come
> out):
> * should these parameters continue to be static-final, or configurable?
> * should POS also play a role in the algorithm (can/should we refine exactly
> what we decompound)?
> * is the Tokenizer the best place to do this, or should we do it in a
> tokenfilter? or both?
> with a tokenfilter, one idea would be to also preserve the original
> indexing term, overlapping it: e.g. ABCD -> AB, CD, ABCD(posInc=0)
> from my understanding this tends to help with noun compounds in other
> languages, because IDF of the original term boosts 'exact' compound matches.
> but does a tokenfilter provide the segmenter enough 'context' to do this
> properly?
> Either way, I think as a start we should turn on what we have by default: its
> likely a very easy win.
--
This message is automatically generated by JIRA.
If you think it was sent incorrectly, please contact your JIRA administrators:
https://issues.apache.org/jira/secure/ContactAdministrators!default.jspa
For more information on JIRA, see: http://www.atlassian.com/software/jira
---------------------------------------------------------------------
To unsubscribe, e-mail: dev-unsubscr...@lucene.apache.org
For additional commands, e-mail: dev-h...@lucene.apache.org
