what is data

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The term data refers to the set of collection of observations of an experiment. It can be collection of facts, such as values or measurements. Data can be numbers, words, measurements, observations or even just descriptions of things.

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Data describes a real-world information resource that is important to your application. Data describes the things, people, products, items, customers, assets, records, and — ultimately — data structures that your application finds useful to categorize, organize, and maintain.

Identifying data is an iterative process. At first you may just know some vague, high-level details about how the application must handle its information. As you keep expanding your knowledge of the application's intended business processes, you continue filling in more details.

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facts and statistics collected together for reference or analysis.
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