NLTK 0.9.9

NLTK (Natural Language Toolkit) is a suite of open source Python modules, data and documentation for research and development in natural language processing.
NLTK contains Code supporting dozens of NLP tasks, along with 40 popular Corpora and extensive Documentation including a 375-page online Book.
NLTK is cross-platform and has distributions for Mac OS X, Windows, and Linux.

Enhancements
NLTK:
- Finalized API for NLTK 2.0 and the book, incl dozens of small fixes
- Names of the form nltk.foo.Bar now available as nltk.Bar for significant functionality; in some cases the name was modified (using old names will produce a deprecation warning)
- Bugfixes in downloader, WordNet
- Expanded functionality in DecisionTree
- Bigram collocations extended for discontiguous bigrams
- Translation toy nltk.misc.babelfish
- New module nltk.help giving access to tagset documentation
- Fix imports so that NLTK builds without Tkinter (Bjorn Maeland)
Data:
- new maxent NE chunker model
- updated grammar packages for the book
- data for new tagsets collection, documenting several tagsets
- added lolcat translation to the Genesis collection
Contrib (work in progress):
- Updates to coreference package (Joseph Frazee)
- New ISRI Arabic stemmer (Hosam Algasaier)
- Updates to Toolbox package (Greg Aumann)
Book:
- Substantial editorial corrections ahead of final submission