Define the top-down approach as it relates to drawing data flow diagrams and briefly discuss what are the tradeoffs involved in deciding how far data streams should be exploded?

Define the top-down approach as it relates to drawing data flow diagrams and briefly discuss what are the tradeoffs involved in deciding how far data streams should be exploded?

Requirements:

* Your discussion should be approximately 200 words.
* Correct grammar, spelling and punctuation are expected.
* Provide your sources of information (references).

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