jira at apache
Nov 14, 2009, 2:27 AM
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[jira] Created: (LUCENE-2067) Czech Stemmer
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Czech Stemmer
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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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