| SGML |
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A standard for how to specify a document markup language or tag set. SGML is not in itself a document language, but a description of how to specify one. It is a metalanguage. HTML and XML are examples of SGML-based languages. A simple coding language using hard-coded tags to represent markup. A sequence of characters organized physically as a set of entities and logically into a hierarchy of elements. The document consists of data characters and markup; the markup describes the structure of the information and an instance of that structure. |