XML
As soon as users, vendors, and web designers became accustomed to HTML, they started to ask for more. The growth of server-side and client-side programming techniques caused many experts to wonder if there might be a way to extend the rigid tag system of HTML. Their goal was to get beyond the conception of a markup language as a means for formatting text and graphics and to employ the language simply as a means for transmitting data. The result of this discussion was a new markup language called Extensible Markup Language, or XML.
As you learned earlier in this hour, the meaning and context for HTML data is limited to what you can express through a set of predefined HTML tags. If the data is enclosed in <H1> tags, it is interpreted as a heading. ...
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