[
https://issues.apache.org/jira/browse/SOLR-3056?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13195966#comment-13195966
]
Christian Moen commented on SOLR-3056:
--------------------------------------
Robert, I've improved the search mode heuristic (see LUCENE-3730 with patch)
and I've also provided some feedback on LUCENE-3726. Before providing a patch
to use search mode as our default, I'd like to do some corpus-based testing to
make sure overall segmentation quality is where I'd like it to be.
As for this JIRA, I guess it has branched out into the following topics:
# Introduce field type for Japanese in {{schema.xml}}
# Move Kuromoji to core to make it generally available in Solr
# Get rid of contrib altogether
There seems to be consensus to move Kuromoji to core from at least three people
(excluding myself).
Do you prefer that we conclude on LUCENE-3726 before we follow up on getting
Japanese support for Solr and Lucene working out-of-the-box -- or can we
conclude on default search mode separately?
I'm happy to start JIRAs for moving Kuromoji to get Japanese support in place
if that's the best next course of action. Please advise. Many thanks.
> Introduce Japanese field type in schema.xml
> -------------------------------------------
>
> Key: SOLR-3056
> URL: https://issues.apache.org/jira/browse/SOLR-3056
> Project: Solr
> Issue Type: New Feature
> Components: Schema and Analysis
> Affects Versions: 3.6, 4.0
> Reporter: Christian Moen
>
> Kuromoji (LUCENE-3305) is now on both on trunk and branch_3x (thanks again
> Robert, Uwe and Simon). It would be very good to get a default field type
> defined for Japanese in {{schema.xml}} so we can good Japanese out-of-the-box
> support in Solr.
> I've been playing with the below configuration today, which I think is a
> reasonable starting point for Japanese. There's lot to be said about various
> considerations necessary when searching Japanese, but perhaps a wiki page is
> more suitable to cover the wider topic?
> In order to make the below {{text_ja}} field type work, Kuromoji itself and
> its analyzers need to be seen by the Solr classloader. However, these are
> currently in contrib and I'm wondering if we should consider moving them to
> core to make them directly available. If there are concerns with additional
> memory usage, etc. for non-Japanese users, we can make sure resources are
> loaded lazily and only when needed in factory-land.
> Any thoughts?
> {code:xml}
> <!-- Text field type is suitable for Japanese text using morphological
> analysis
> NOTE: Please copy files
> contrib/analysis-extras/lucene-libs/lucene-kuromoji-x.y.z.jar
> dist/apache-solr-analysis-extras-x.y.z.jar
> to your Solr lib directory (i.e. example/solr/lib) before before
> starting Solr.
> (x.y.z refers to a version number)
> If you would like to optimize for precision, default operator AND with
> <solrQueryParser defaultOperator="AND"/>
> below (this file). Use "OR" if you would like to optimize for recall
> (default).
> -->
> <fieldType name="text_ja" class="solr.TextField" positionIncrementGap="100"
> autoGeneratePhraseQueries="false">
> <analyzer>
> <!-- Kuromoji Japanese morphological analyzer/tokenizer
> Use search-mode to get a noun-decompounding effect useful for search.
> Example:
> 関西国際空港 (Kansai International Airpart) becomes 関西 (Kansai) 国際
> (International) 空港 (airport)
> so we get a match for 空港 (airport) as we would expect from a good
> search engine
> Valid values for mode are:
> normal: default segmentation
> search: segmentation useful for search (extra compound splitting)
> extended: search mode with unigramming of unknown words
> (experimental)
> NOTE: Search mode improves segmentation for search at the expense of
> part-of-speech accuracy
> -->
> <tokenizer class="solr.KuromojiTokenizerFactory" mode="search"/>
> <!-- Reduces inflected verbs and adjectives to their base/dectionary
> forms (辞書形) -->
> <filter class="solr.KuromojiBaseFormFilterFactory"/>
> <!-- Optionally remove tokens with certain part-of-speeches
> <filter class="solr.KuromojiPartOfSpeechStopFilterFactory"
> tags="stopTags.txt" enablePositionIncrements="true"/> -->
> <!-- Normalizes full-width romaji to half-with and half-width kana to
> full-width (Unicode NFKC subset) -->
> <filter class="solr.CJKWidthFilterFactory"/>
> <!-- Lower-case romaji characters -->
> <filter class="solr.LowerCaseFilterFactory"/>
> </analyzer>
> </fieldType>
> {code}
--
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: [email protected]
For additional commands, e-mail: [email protected]
