part-of-speech tagging
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In corpus linguistics, part-of-speech tagging (POS tagging or POST), also called grammar|grammatical tagging or lexical category|word-category disambiguation, is the process of marking up a word in a text (corpus) as corresponding to a particular parts of speech|part of speech, based on both its definition, as well as its context—i.e. lexicography|relationship with adjacent and related words in a phrase, Sentence (linguistics)|sentence, or paragraph. A simplified form of this is commonly taught to school-age children, in the identification of words as nouns, verbs, adjectives, adverbs, etc. Once performed by hand, POS tagging is now done in the context of computational linguistics, using algorithms which associate discrete terms, as well as hidden parts of speech, in accordance with a set of descriptive tags. POS-tagging algorithms fall into two distinctive groups: rule-based and stochastic. Brill tagger|E. Brill's tagger, one of the first and widely used English...
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