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XML rocks. For example look at the XML on the amazon affiliate program, instead of writing your own spider to search their site, blah blah blah, to display affiliate code on their page, you can simply use their XML utility and have your script fetch a page with stuff like this...
Pretend the *'s are < >'s please.
*ProductName*Product 1*/ProductName*
*Price*$15.40*/Price*
etc.etc.
It makes sending data between applications, services and programs very easy which is the main purpose.. I love it!
The main advantage it has over existing technologies is that is is a stanard, and extremely easy to understand.
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