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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Introduction
There were 2 main XML parsing technologies few years ago. They were SAX and DOM.

SAX is event-driven and the events are fired and forget along the xml parsing. Advantages: It doesn’t need to cache the whole xml document in memory and you don’t need to wait til the whole xml been parsed before the first [...]

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