ClassifierBasedPOSTagger uses classification to do part-of-speech tagging.
Features are extracted from words, then passed to an internal classifier. The classifier classifies the features and returns a label; in this case, a part-of-speech tag. Classification will be covered in detail in Chapter 7, Text Classification.
ClassifierBasedPOSTagger is a subclass of
ClassifierBasedTagger that implements a
feature detector that combines many of the techniques of previous taggers into a single feature set
. The feature detector finds multiple length suffixes, does some regular expression matching, and looks at the unigram, bigram, and trigram history to produce a fairly complete set of features for each word. The feature ...