Hi,
I had a very similar Problem while searching in a bibliographic field called
"signatur". I could solve it by the help of additional Filterclasses. At the
moment I use the following Filters. Then it works for me:
...
<charFilter class="solr.MappingCharFilterFactory"
mapping="mapping-FoldToASCII.txt"/>
<tokenizer class="solr.WhitespaceTokenizerFactory"/>
<filter class="solr.StopFilterFactory" ignoreCase="true"
words="stopwords.txt" enablePositionIncrements="true" />
<filter class="solr.WordDelimiterFilterFactory"
generateWordParts="1" generateNumberParts="1" catenateWords="1"
catenateNumbers="1" catenateAll="0" splitOnCaseChange="1"/>
<filter class="solr.LowerCaseFilterFactory"/>
<filter class="solr.SnowballPorterFilterFactory" language="German" />
<filter class="solr.RemoveDuplicatesTokenFilterFactory"/>
<filter class="solr.ReversedWildcardFilterFactory" withOriginal="true"
maxPosAsterisk="2" maxPosQuestion="1" minTrailing="2"
maxFractionAsterisk="0"/>
...
The MappingCharFilterFactory I have added in order to have a better support
of german "Umlaute". Concerning the Wildcards:
It is important that you use the ReversedWildcardFilterFactory only at index
time. All other Filters I also use at query time.
Perhaps it could help.
Dirk
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erste Erfahrungen mit SOLR u. Vufind
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