Natural Language Toolkit

Natural Language Toolkit
Natural Language Toolkit
Original author(s) Edward Loper, Steven Bird
Developer(s) NLTK - Developers and contributors
Initial release 2001[1]
Stable release 2.0b9 / July 25, 2010; 14 months ago (2010-07-25)
Preview release 2.0.1 (rc1) / April 11, 2011; 6 months ago (2011-04-11)
Written in Python
Available in Python
Type natural language processing
License Apache 2.0

Natural Language Toolkit or, more commonly, NLTK is a suite of libraries and programs for symbolic and statistical natural language processing (NLP) for the Python programming language. NLTK includes graphical demonstrations and sample data. It is accompanied by extensive documentation, including a book that explains the underlying concepts behind the language processing tasks supported by the toolkit.[2]

NLTK is ideally suited to students who are learning NLP or conducting research in NLP or closely related areas, including empirical linguistics, cognitive science, artificial intelligence, information retrieval, and machine learning.[3] NLTK has been used successfully as a teaching tool, as an individual study tool, and as a platform for prototyping and building research systems. The NLTK Project is led by Steven Bird.


  1. ^ project site Registered:2001-07-09
  2. ^ Bird, Steven; Ewan Klein; Edward Loper (2009). Natural Language Processing with Python. O'Reilly Media Inc. ISBN 0-596-51649-5. 
  3. ^ Bird, Steven; Ewan Klein; Edward Loper; Jason Baldridge (2008). Multidisciplinary instruction with the Natural Language Toolkit. Proceedings of the Third Workshop on Issues in Teaching Computational Linguistics, ACL. 

External links

Wikimedia Foundation. 2010.

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