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Nick Lewis is a staff writer for How-To Geek. For example, the following simple HTML code uses tags to make some words bold and some italic: HTML uses a pre-defined set of markup symbols (short codes) that describe the format of content on a web page. It's probably easiest to compare it to another markup language with which you might be familiar - the Hypertext Markup Language (HTML) used to encode web pages. It does this through the use of tags that define the structure of the document, as well as how the document should be stored and transported. XML is a markup language created by the World Wide Web Consortium (W3C) to define a syntax for encoding documents that both humans and machines could read. These are really just plain text files that use custom tags to describe the structure and other features of the document. xml file extension is an Extensible Markup Language (XML) file.
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XML files are used as the basis for various document formats, including RSS, Microsoft.
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XML is different from HTML because it allows users to create their own markup symbols, making it extensible and self-defining.It uses custom tags to describe the structure and features of the document. XML is a markup language used to encode documents that can be read by both humans and machines.