http://lucene.apache.org/lucene-parent/lucene-analyzers-morfologik: A dictionary-driven lemmatizer for Polish (includes morphosyntactic annotations) (The Apache Software Foundation) 
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This package provides dictionary-driven lemmatization ("accurate stemming")
filter and analyzer for the Polish Language, driven by the
Morfologik library developed 
by Dawid Weiss and Marcin Miłkowski.


The MorfologikFilter yields one or more terms for each token. Each
of those terms is given the same position in the index.



/**
 * This package provides dictionary-driven lemmatization ("accurate stemming")
 * filter and analyzer for the Polish Language, driven by the
 * <a href="http://morfologik.blogspot.com/">Morfologik library</a> developed 
 * by Dawid Weiss and Marcin Miłkowski.
 * <p>
 * The MorfologikFilter yields one or more terms for each token. Each
 * of those terms is given the same position in the index.
 * </p>
 */
package org.apache.lucene.analysis.morfologik;