Hi,
With your patch, words like
Haus
Häuser
will have different a root.
How did you test your changes? Can you provide some statistics,
like how many over- and understemming your patch will produce
for a 50.000 words corpus?
Anyway, such changes are likely not acceptable because they
break the compatibility with Java Lucene and with existing indexes.
Robert
On 13.01.2012 16:27, Björn Kremer wrote:
Hello,
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
Björn
