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From "Robert Muir (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (LUCENE-5379) Kurdish Analyzer
Date Sun, 29 Dec 2013 07:12:50 GMT

     [ https://issues.apache.org/jira/browse/LUCENE-5379?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Robert Muir updated LUCENE-5379:
--------------------------------

    Attachment: ckbtestdata.zip

Vocabulary data zip

> Kurdish Analyzer
> ----------------
>
>                 Key: LUCENE-5379
>                 URL: https://issues.apache.org/jira/browse/LUCENE-5379
>             Project: Lucene - Core
>          Issue Type: New Feature
>          Components: modules/analysis
>            Reporter: Robert Muir
>         Attachments: LUCENE-5379.patch, ckbtestdata.zip
>
>
> Normalizer+Stemmer+Stopwords for Sorani kurdish (written in the arabic script).
> The most important piece is the normalization: this varies wildly in practice.
> The stemmer is a light stemmer, very simple and not aggressive at all.
> I tested against the pewan test collection, see:
> * http://eng.uok.ac.ir/esmaili/research/klpp/downloads/publications/AICCSA2013.pdf
> * http://eng.uok.ac.ir/esmaili/research/klpp/en/downloads.htm
> baseline is StandardAnalyzer.
> ||short queries (T)||TFIDF||BM25||I(ne)B2||
> |baseline|0.2355|0.2473|0.2702|
> |patch|0.2930 (+24%)|0.3163 (+28%)|0.3309 (+22%)|
> ||long queries (D)||TFIDF||BM25||I(ne)B2||
> |baseline|0.3111|0.3185|0.3547|
> |patch|0.4060 (+31%)|0.4422 (+39%)|0.4800 (+35%)|



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