Guide to Game Development/Data file types/.xml

.xml is shorthand for eXtensible Markup Language, and is a widely popular format for storing data in video games. XML is essentially meta-data: that is, data about data. The programmer can extend the capabilities of XML and create their own tags, hence the term "extensible". It is a markup language in that it is made up of tags, which look something like this:

<?xml version="1.0" encoding="UTF-8"?>
<note>
  <to>John</to>
  <from>Jane</from>
  <heading>Reminder</heading>
  <body>Don't forget me this weekend!</body>
</note>

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