Data can be represented in text format for human and binary format for computer. Here my focus will be on text representation.

For application, we commonly use XML because:

Its self-documenting format describes structure and field names as well as specific values. And it is easily digested by both human and machine.
It is platform-independent, thus relatively immune [...]

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Here is the list of reasons why I chose Flex for the RIA development.

Write Once Deploy Everywhere - Flex generates SWF that runs on top of Flash Player VM and behaves consistently across different browsers, even mobile phones later. With this, all the browser compatibility issues are basically offloaded by Adobe.
Solid programming model with rich [...]

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