Natural Language Toolkit

Natural Language Toolkit
Original author(s)Steven Bird, Edward Loper, Ewan Klein
Developer(s)Team NLTK
Initial release2001; 23 years ago (2001)[1]
Stable release
3.9.1[2] Edit this on Wikidata / 19 August 2024; 2 months ago (19 August 2024)
Repository
Written inPython
TypeNatural language processing
LicenseApache 2.0[3]
Websitewww.nltk.org
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.[4] It was developed by Steven Bird and Edward Loper in the Department of Computer and Information Science at the University of Pennsylvania.[5] 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,[6] plus a cookbook.[7]

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.[8] NLTK has been used successfully as a teaching tool, as an individual study tool, and as a platform for prototyping and building research systems. There are 32 universities in the US and 25 countries using NLTK in their courses.

  1. ^ "Project site on SourceForge". 9 July 2001.
  2. ^ "Release 3.9.1". 19 August 2024. Retrieved 23 August 2024.
  3. ^ Cite error: The named reference license was invoked but never defined (see the help page).
  4. ^ "NLTK Courses". Google Docs. Retrieved 15 June 2016.
  5. ^ "Preface". www.nltk.org. Retrieved 15 June 2016.
  6. ^ Cite error: The named reference Bird-Klein-Loper was invoked but never defined (see the help page).
  7. ^ Cite error: The named reference Perkins was invoked but never defined (see the help page).
  8. ^ Cite error: The named reference Bird-Klein-Loper-Baldridge was invoked but never defined (see the help page).