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Data validation rules may be defined, designed and deployed, for example: Definition and design contexts: Data that does not conform to these rules will negatively affect business process execution.

Therefore, data validation should start with business process definition and set of business rules within this process.

In evaluating the basics of data validation, generalizations can be made regarding the different types of validation, according to the scope, complexity, and purpose of the various validation operations to be carried out.One of the most serious input attacks is a buffer overflow that specifically targets input fields in Web applications.For instance, a credit-reporting application may authenticate users before they're allowed to submit data or pull reports.If so, it allows it to be submitted to the server and (usually) saved in a database; if not, it gives you error messages to explain what you've done wrong (provided you've done it right).Form validation can be implemented in a number of different ways.

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