- XML:
- Extensible Markup Language is a subset of ISO 8879, Standard Generalized Markup Language (SGML). XML has been designed specifically to function on the Web, and both major browsers support it. Currently a formal recommendation from the World Wide Web Consortium (W3C), XML is similar to HTML in that both XML and HTML contain markup symbols to describe the contents of a page or file. HTML, however, describes the content of a Web page only in terms of how it is to be displayed. XML describes the content in terms of what the data is that is being described. For example the <authname><affil> tags could indicate that the data following it was an author's name and his affiliation. This allows an XML file to be processed purely as data by a program as well as being displayed in a certain way. XML is "extensible" because, unlike HTML, the markup symbols are unlimited and self-defining.
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