XML

XML stands for EXtensible Markup Language.
XML was designed to transport and store data.

Introduction to XML
Before you continue you should have a basic understanding of the following:
HTML
JavaScript
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What is XML?
XML stands for EXtensible Markup Language
XML is a markup language much like HTML
XML was designed to carry data, not to display data
XML tags are not predefined. You must define your own tags
XML is designed to be self-descriptive
XML is a W3C Recommendation