![]() For example, POS-tagged versions of major English language corpora such as the Brown Corpus, the LOB Corpus and the British National Corpus have been distributed widely throughout the world for those who would like to make use of the tagging, as well as of the original 'raw' corpus. From this perspective, probably a majority view, adding annotation to a corpus is giving 'added value', which can be used for research by the individual or team that carried out the annotation, but which can also be passed on to others who may find it useful for their own purposes. For others, annotation is a means to make a corpus much more useful - an enrichment of the original raw corpus. Some people (notably John Sinclair - see chapter 1) prefer not to engage in corpus annotation: for them, the unannotated corpus is the 'pure' corpus they want to investigate - the corpus without adulteration with information which is suspect, possibly reflecting the predilections, or even the errors, of the annotator. Present_NN1 (singular common noun) present_VVB (base form of a lexical verb) present_JJ (general adjective) Using one simple method of representing the POS tags - attaching tags to words by an underscore symbol - these three words may be annotated as follows: The meanings of these same-looking words are very different, and also there is a difference of pronunciation, since the verb present has stress on the final syllable. If a word in a text is spelt present, it may be a noun (= 'gift'), a verb (= 'give someone a present') or an adjective (= 'not absent'). ![]() This is so-called part-of-speech tagging (or POS tagging), and can be useful, for example, in distinguishing words which have the same spelling, but different meanings or pronunciation. For example, one common type of annotation is the addition of tags, or labels, indicating the word class to which words in a text belong. What is corpus annotation?Ĭorpus annotation is the practice of adding interpretative linguistic information to a corpus. Geoffrey Leech, Lancaster University © Geoffrey Leech 2004 1.
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