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From "Prescott Nasser (Created) (JIRA)" <>
Subject [Lucene.Net] [jira] [Created] (LUCENENET-466) optimisation for the GermanStemmer.vb‏
Date Fri, 13 Jan 2012 18:00:40 GMT
optimisation for the GermanStemmer.vb‏

                 Key: LUCENENET-466
             Project: Lucene.Net
          Issue Type: Improvement
          Components: Lucene.Net Contrib
    Affects Versions: Lucene.Net 2.9.4, Lucene.Net 3.0.3, Lucene.Net 2.9.4g
            Reporter: Prescott Nasser
            Priority: Minor
             Fix For: Lucene.Net 3.0.3

I have a little optimisation for the GermanStemmer.vb (in 
Contrib.Analyzers) class. At the moment the function "Substitute" 
converts the german "Umlaute" "ä" in "a", "ö" in"o" and "ü" in "u". This 
is not the correct german translation. They must be converted to "ae", 
"oe" and "ue". So I can write the name "Björn" or "Bjoern" but not 
"Bjorn". With this optimization a user can search for "Björn" and also 
find "Bjoern".
Here is the optimized code snippet:
else if ( buffer[c] == 'ä' )
 buffer[c] = 'a';
 buffer.Insert(c + 1, 'e');
 else if ( buffer[c] == 'ö' )
 buffer[c] = 'o';
 buffer.Insert(c + 1,'e');
 else if ( buffer[c] == 'ü' )
 buffer[c] = 'u';
 buffer.Insert(c + 1,'e');
Thank You

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