"Natural" is a general natural language facility for nodejs. It offers a broad range of functionalities for natural language processing. Documentation can be found here on GitHub Pages.
Copyright (c) 2011, 2012 Chris Umbel, Rob Ellis, Russell Mull, Hugo W.L. ter Doest
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The Porter stemmer for German is licensed by a BSD license. It states Standard BSD License in the source code, interpreted as the original BSD license consisting of four clauses.