3.1 Textual Markup
SGML consists of tags for elements (such as paragraphs), and of entity references for non-ASCII characters and miscellaneous symbols. Tags take the form < > at the beginning of an element, and </ > at the end, e.g. <text>...</text>. Tags can further contain a number of attributes within the pointed brackets, which specify additional characteristics of the element. The rend attribute (e.g. <text rend="roman">) giving type font information, e.g., is one which can occur with almost any tag.
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