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From "Robert Muir (JIRA)" <j...@apache.org>
Subject [jira] Created: (LUCENE-2067) Czech Stemmer
Date Sat, 14 Nov 2009 10:27:39 GMT
Czech Stemmer
-------------

                 Key: LUCENE-2067
                 URL: https://issues.apache.org/jira/browse/LUCENE-2067
             Project: Lucene - Java
          Issue Type: New Feature
          Components: contrib/analyzers
            Reporter: Robert Muir
            Priority: Minor
             Fix For: 3.1


Currently, the CzechAnalyzer is merely stopwords, and there isn't a czech stemmer in snowball.

This patch implements the light stemming algorithm described in: http://portal.acm.org/citation.cfm?id=1598600

In their measurements, it improves MAP 42%

The analyzer does not use this stemmer if LUCENE_VERSION <= 3.0, for back compat.


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