Natural Language Toolkit

Natural Language Toolkit
Original authors	Steven Bird, Edward Loper, Ewan Klein
Developer	Team NLTK
Initial release	2001 (2001)
Repository	{{URL|example.com|optional display text}}
Written in	Python
Engine
Type	Natural language processing
License	Apache 2.0
Website	www.nltk.org

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Parse tree generated with NLTK

The Natural Language Toolkit, or more commonly NLTK, is a suite of libraries and programs for symbolic and statistical natural language processing (NLP) for English written in the Python programming language. It supports classification, tokenization, stemming, tagging, parsing, and semantic reasoning functionalities. It was developed by Steven Bird and Edward Loper in the Department of Computer and Information Science at the University of Pennsylvania. 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.

Library highlights

• Discourse representation
• Lexical analysis: Word and text tokenizer
• n-gram and collocations
• Part-of-speech tagger
• Tree model and Text chunker for capturing
• Named-entity recognition

See also

• SpaCy

External links

• Official website