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| <article class="content wrap" id="_content" data-uid="Lucene.Net.Analysis.De"> |
| |
| <h1 id="Lucene_Net_Analysis_De" data-uid="Lucene.Net.Analysis.De" class="text-break">Namespace Lucene.Net.Analysis.De |
| </h1> |
| <div class="markdown level0 summary"><!-- |
| Licensed to the Apache Software Foundation (ASF) under one or more |
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| <p>Analyzer for German.</p> |
| </div> |
| <div class="markdown level0 conceptual"></div> |
| <div class="markdown level0 remarks"></div> |
| <h3 id="classes">Classes |
| </h3> |
| <h4><a class="xref" href="Lucene.Net.Analysis.De.GermanAnalyzer.html">GermanAnalyzer</a></h4> |
| <section><p><span class="xref">Lucene.Net.Analysis.Analyzer</span> for German language. |
| <p> |
| Supports an external list of stopwords (words that |
| will not be indexed at all) and an external list of exclusions (word that will |
| not be stemmed, but indexed). |
| A default set of stopwords is used unless an alternative list is specified, but the |
| exclusion list is empty by default. |
| </p></p> |
| <p>You must specify the required <span class="xref">Lucene.Net.Util.LuceneVersion</span> |
| compatibility when creating GermanAnalyzer: |
| |
| |
| </p> |
| <p><strong>NOTE</strong>: This class uses the same <span class="xref">Lucene.Net.Util.LuceneVersion</span> |
| dependent settings as <a class="xref" href="Lucene.Net.Analysis.Standard.StandardAnalyzer.html">StandardAnalyzer</a>.</p> |
| </section> |
| <h4><a class="xref" href="Lucene.Net.Analysis.De.GermanLightStemFilter.html">GermanLightStemFilter</a></h4> |
| <section><p>A <span class="xref">Lucene.Net.Analysis.TokenFilter</span> that applies <a class="xref" href="Lucene.Net.Analysis.De.GermanLightStemmer.html">GermanLightStemmer</a> to stem German |
| words. |
| <p> |
| To prevent terms from being stemmed use an instance of |
| <a class="xref" href="Lucene.Net.Analysis.Miscellaneous.SetKeywordMarkerFilter.html">SetKeywordMarkerFilter</a> or a custom <span class="xref">Lucene.Net.Analysis.TokenFilter</span> that sets |
| the <a class="xref" href="http://localhost:8080/api/core/Lucene.Net.Analysis.TokenAttributes.KeywordAttribute.html">KeywordAttribute</a> before this <span class="xref">Lucene.Net.Analysis.TokenStream</span>. |
| </p></p> |
| </section> |
| <h4><a class="xref" href="Lucene.Net.Analysis.De.GermanLightStemFilterFactory.html">GermanLightStemFilterFactory</a></h4> |
| <section><p>Factory for <a class="xref" href="Lucene.Net.Analysis.De.GermanLightStemFilter.html">GermanLightStemFilter</a>.</p> |
| <pre><code><fieldType name="text_delgtstem" class="solr.TextField" positionIncrementGap="100"> |
| <analyzer> |
| <tokenizer class="solr.StandardTokenizerFactory"/> |
| <filter class="solr.LowerCaseFilterFactory"/> |
| <filter class="solr.GermanLightStemFilterFactory"/> |
| </analyzer> |
| </fieldType></code></pre> |
| </section> |
| <h4><a class="xref" href="Lucene.Net.Analysis.De.GermanLightStemmer.html">GermanLightStemmer</a></h4> |
| <section><p>Light Stemmer for German. |
| <p> |
| This stemmer implements the "UniNE" algorithm in: |
| <code>Light Stemming Approaches for the French, Portuguese, German and Hungarian Languages</code> |
| Jacques Savoy |
| </p></p> |
| </section> |
| <h4><a class="xref" href="Lucene.Net.Analysis.De.GermanMinimalStemFilter.html">GermanMinimalStemFilter</a></h4> |
| <section><p>A <span class="xref">Lucene.Net.Analysis.TokenFilter</span> that applies <a class="xref" href="Lucene.Net.Analysis.De.GermanMinimalStemmer.html">GermanMinimalStemmer</a> to stem German |
| words. |
| <p> |
| To prevent terms from being stemmed use an instance of |
| <a class="xref" href="Lucene.Net.Analysis.Miscellaneous.SetKeywordMarkerFilter.html">SetKeywordMarkerFilter</a> or a custom <span class="xref">Lucene.Net.Analysis.TokenFilter</span> that sets |
| the <a class="xref" href="http://localhost:8080/api/core/Lucene.Net.Analysis.TokenAttributes.KeywordAttribute.html">KeywordAttribute</a> before this <span class="xref">Lucene.Net.Analysis.TokenStream</span>. |
| </p></p> |
| </section> |
| <h4><a class="xref" href="Lucene.Net.Analysis.De.GermanMinimalStemFilterFactory.html">GermanMinimalStemFilterFactory</a></h4> |
| <section><p>Factory for <a class="xref" href="Lucene.Net.Analysis.De.GermanMinimalStemFilter.html">GermanMinimalStemFilter</a>.</p> |
| <pre><code><fieldType name="text_deminstem" class="solr.TextField" positionIncrementGap="100"> |
| <analyzer> |
| <tokenizer class="solr.StandardTokenizerFactory"/> |
| <filter class="solr.LowerCaseFilterFactory"/> |
| <filter class="solr.GermanMinimalStemFilterFactory"/> |
| </analyzer> |
| </fieldType></code></pre> |
| </section> |
| <h4><a class="xref" href="Lucene.Net.Analysis.De.GermanMinimalStemmer.html">GermanMinimalStemmer</a></h4> |
| <section><p>Minimal Stemmer for German. |
| <p> |
| This stemmer implements the following algorithm: |
| <code>Morphologie et recherche d'information</code> |
| Jacques Savoy. |
| </p></p> |
| </section> |
| <h4><a class="xref" href="Lucene.Net.Analysis.De.GermanNormalizationFilter.html">GermanNormalizationFilter</a></h4> |
| <section><p>Normalizes German characters according to the heuristics |
| of the <code><a href="http://snowball.tartarus.org/algorithms/german2/stemmer.html">http://snowball.tartarus.org/algorithms/german2/stemmer.html</a> |
| German2 snowball algorithm</code>. |
| It allows for the fact that ä, ö and ü are sometimes written as ae, oe and ue. |
| <p> |
| <p> |
| <p> |
| This is useful if you want this normalization without using |
| the German2 stemmer, or perhaps no stemming at all. |
| </p></p> |
| </section> |
| <h4><a class="xref" href="Lucene.Net.Analysis.De.GermanNormalizationFilterFactory.html">GermanNormalizationFilterFactory</a></h4> |
| <section><p>Factory for <a class="xref" href="Lucene.Net.Analysis.De.GermanNormalizationFilter.html">GermanNormalizationFilter</a>.</p> |
| <pre><code><fieldType name="text_denorm" class="solr.TextField" positionIncrementGap="100"> |
| <analyzer> |
| <tokenizer class="solr.StandardTokenizerFactory"/> |
| <filter class="solr.LowerCaseFilterFactory"/> |
| <filter class="solr.GermanNormalizationFilterFactory"/> |
| </analyzer> |
| </fieldType></code></pre> |
| </section> |
| <h4><a class="xref" href="Lucene.Net.Analysis.De.GermanStemFilter.html">GermanStemFilter</a></h4> |
| <section><p>A <span class="xref">Lucene.Net.Analysis.TokenFilter</span> that stems German words. |
| <p> |
| It supports a table of words that should |
| not be stemmed at all. The stemmer used can be changed at runtime after the |
| filter object is created (as long as it is a <a class="xref" href="Lucene.Net.Analysis.De.GermanStemmer.html">GermanStemmer</a>). |
| </p> |
| <p> |
| To prevent terms from being stemmed use an instance of |
| <a class="xref" href="Lucene.Net.Analysis.Miscellaneous.SetKeywordMarkerFilter.html">SetKeywordMarkerFilter</a> or a custom <span class="xref">Lucene.Net.Analysis.TokenFilter</span> that sets |
| the <a class="xref" href="http://localhost:8080/api/core/Lucene.Net.Analysis.TokenAttributes.KeywordAttribute.html">KeywordAttribute</a> before this <span class="xref">Lucene.Net.Analysis.TokenStream</span>. |
| </p> </p> |
| </section> |
| <h4><a class="xref" href="Lucene.Net.Analysis.De.GermanStemFilterFactory.html">GermanStemFilterFactory</a></h4> |
| <section><p>Factory for <a class="xref" href="Lucene.Net.Analysis.De.GermanStemFilter.html">GermanStemFilter</a>. </p> |
| <pre><code><fieldType name="text_destem" class="solr.TextField" positionIncrementGap="100"> |
| <analyzer> |
| <tokenizer class="solr.StandardTokenizerFactory"/> |
| <filter class="solr.LowerCaseFilterFactory"/> |
| <filter class="solr.GermanStemFilterFactory"/> |
| </analyzer> |
| </fieldType></code></pre> |
| </section> |
| <h4><a class="xref" href="Lucene.Net.Analysis.De.GermanStemmer.html">GermanStemmer</a></h4> |
| <section><p>A stemmer for German words. |
| <p> |
| The algorithm is based on the report |
| "A Fast and Simple Stemming Algorithm for German Words" by Jörg |
| Caumanns (joerg.caumanns at isst.fhg.de). |
| </p></p> |
| </section> |
| </article> |
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