Natural Language Toolkit
|Original author(s)||Steven Bird, Edward Loper, Ewan Klein|
|Developer(s)||NLTK - Developers and contributors|
|Stable release||2.0.4 / 7 November 2012|
|Preview release||3.0a0 / 14 January 2013|
|Type||Natural language processing|
|License||Apache 2.0 See note|
The 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 a book that explains the underlying concepts behind the language processing tasks supported by the toolkit, plus a cookbook.
NLTK is intended to support research and teaching in NLP or closely related areas, including empirical linguistics, cognitive science, artificial intelligence, information retrieval, and machine learning. 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 __init__.py file of version 2.0.4 states at line 7: "# For license information, see LICENSE.TXT" This is apparently a reference to code.google.com/p/nltk/source/browse/trunk/nltk/LICENSE.txt.
The reference on the Sourceforge page to GPL appears to relate to an older version?
- project site on SourceForge; registered:2001-07-09
- "NLTK ChangeLog". nltk.org. Retrieved 2012-12-20.
- Bird, Steven; Ewan Klein; Edward Loper (2009). Natural Language Processing with Python. O'Reilly Media Inc. ISBN 0-596-51649-5.
- Perkins, Jacob (2010). Python Text Processing with NLTK 2.0 Cookbook. Packt Publishing. ISBN 1849513600.
- 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.
- Official website
- NLTK book online
- NLTK development at GitHub
- API documentation
- NLTK Presentation at Baypiggies User Group on YouTube. Presented at the Google Campus on 12 June 2007.
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