Natural Language Processing: Python and NLTK

Chapter 4. Part-of-speech Tagging

In this chapter, we will cover the following recipes:

• Default tagging
• Training a unigram part-of-speech tagger
• Combining taggers with backoff tagging
• Training and combining ngram taggers
• Creating a model of likely word tags
• Tagging with regular expressions
• Affix tagging
• Training a Brill tagger
• Training the TnT tagger
• Using WordNet for tagging
• Tagging proper names
• Classifier-based tagging
• Training a tagger with NLTK-Trainer

Introduction

Part-of-speech tagging is the process of converting a sentence, in the form of a list of words, into a list of tuples, where each tuple is of the form (word, tag). The tag is a part-of-speech tag, and signifies whether the word is a noun, adjective, verb, and so on.

Part-of-speech tagging is a ...