Some people will tell you that XML is a flat-file data source. Others say that it is God's gift to planet Earth. The middle-ground definition would be that it is a convenient and flexible way of sharing data.
XML stands for Extensible Markup Language and uses a tag-based syntax similar to HTML to display data. Many different flavors of XML exist, with compatible applications that can parse XML files and interpret them in a useful way.
XML can be useful to you if you want to provide other Web sites with the ability to publish or syndicate content that originates from your site. For example, a corporate Web site may want to allow people to syndicate its company press releases and can do so by way of XML.
One of the simplest uses of XML is the ...