XML stands for the Extensible Markup Language. It was developed after the HTML (Hyper-Text Markup Language) came into common usage on the World Wide Web. XML provides several advantages over HTML. Both are known as "tagged text" formats. The tags can identify such things as the paragraph structure, the codes applied to stories, the links between and among elements of a story (the item itself, sidebars, pictures, graphics, etc.) and even elements within the text itself (names, titles, places, currencies, amounts, measurements, etc). HTML is primarily a pre-defined set of tags. XML is a language used to define various sets of tags. Using XML, we are better able to separate the information itself (content) from information about the information (metadata). In addition, XML provides a standard way to reference non-textual media.
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