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The punctuation category is clearly the most peripheral of the above categories as regards relevance to morphosyntax. There is also a scale of peripherality within the punctuation category. For example, on the boundary between punctuation and the mark-up of a text are such features as highlighting, whether realised by italics, bold-face, or capitals, which according to one view, should be included within tagging schemes.
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EAGLES-external link
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EAGLES-external link
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