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From "Jamie Johnson (Created) (JIRA)" <j...@apache.org>
Subject [jira] [Created] (SOLR-3231) Add the ability to KStemmer to preserve the original token when stemming
Date Sun, 11 Mar 2012 02:34:57 GMT
Add the ability to KStemmer to preserve the original token when stemming
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                 Key: SOLR-3231
                 URL: https://issues.apache.org/jira/browse/SOLR-3231
             Project: Solr
          Issue Type: Improvement
          Components: Schema and Analysis
    Affects Versions: 4.0
            Reporter: Jamie Johnson
         Attachments: KStemFilter.patch

While using the PorterStemmer, I found that there were often times that it was far to aggressive
in it's stemming.  In my particular case it is unrealistic to provide a protected word list
which captures all possible words which should not be stemmed.  To avoid this I proposed a
solution whereby we store the original token as well as the stemmed token so exact searches
would always work.  Based on discussions on the mailing list Ahmet Arslan, I believe the attached
patch to KStemmer provides the desired capabilities through a configuration parameter.  This
largely is a copy of the org.apache.lucene.wordnet.SynonymTokenFilter.  

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