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This package contains different tools to add NLP capabilities for German to Lucene 4.x (it has been tested using Lucene version from 4.6.x to 4.8.1).
It allows the user to lemmatize words to be indexed, to filter by parts of speech (e.g. leaving out pronouns), and to add synonyms taken from GermaNet to the search index and thereby increase recall of lucene.

GermanLanguageProcessing4Lucene Web Site


  • Part of peech filtering for Lucene
  • Lemmatization for Lucene
  • German synonym Expansion for Lucene

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