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Python 3 Text Processing with NLTK 3 Cookbook by Jacob Perkins

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Creating a part-of-speech tagged word corpus

Part-of-speech tagging is the process of identifying the part-of-speech tag for a word. Most of the time, a tagger must first be trained on a training corpus. How to train and use a tagger is covered in detail in Chapter 4, Part-of-speech Tagging, but first we must know how to create and use a training corpus of part-of-speech tagged words.

Getting ready

The simplest format for a tagged corpus is of the form word/tag. The following is an excerpt from the brown corpus:

The/at-tl expense/nn and/cc time/nn involved/vbn are/ber astronomical/jj ./.

Each word has a tag denoting its part-of-speech. For example, nn refers to a noun, while a tag that starts with vb is a verb.

Note

Different corpora can use different ...

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