IWNLP

IWNLP is a dictionary-based lemmatizer for the German language. It is based on the German edition of Wiktionary. IWNLP consists of two parts:

• IWNLP: A parser for the German edition of Wiktionary
• IWNLP.Lemmatizer: A German lemmatizer that uses the output from IWNLP to produce a mapping from an inflected form to a lemma.

More details can be found at www.iwnlp.com
We also provide a Python implementation for the lemmatizer: IWNLP-py

How to run IWNLP

• Clone the project and build it
• Download https://dumps.wikimedia.org/dewiktionary/latest/dewiktionary-latest-pages-articles.xml.bz2
• Unpack dewiktionary-latest-pages-articles.xml.bz2
• Start IWNLP.Parser.exe with two parameters: Path to the unzipped file, path to the export file. For instance

IWNLP.Parser.exe "c:\\dewiktionary-latest-pages-articles.xml" "c:\\parsedIWNLP_latest.xml"

• Follow the steps from IWNLP.Lemmatizer to create the lemmatization mapping

Citation

Please include the following BibTeX if you use IWNLP in your work:

@InProceedings{liebeck-conrad:2015:ACL-IJCNLP,
  author    = {Liebeck, Matthias  and  Conrad, Stefan},
  title     = {{IWNLP: Inverse Wiktionary for Natural Language Processing}},
  booktitle = {Proceedings of the 53rd Annual Meeting of the Association for Computational Linguistics and the 7th International Joint Conference on Natural Language Processing (Volume 2: Short Papers)},
  year      = {2015},
  publisher = {Association for Computational Linguistics},
  pages     = {414--418},
  url       = {http://www.aclweb.org/anthology/P15-2068}
}