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{{Short description|The process of ensuring computer data is both correct and useful}}
{{redirect|Input validation||Improper input validation}}
{{more citations needed|date=November 2016}}
In [[computer science]], '''data validation''' is the process of ensuring [[data]] has undergone [[data cleansing]] to ensure they have [[data quality]], that is, that they are both correct and useful. It uses routines, often called "validation rules", "validation constraints", or "check routines", that check for correctness, meaningfulness, and security of data that are input to the system. The rules may be implemented through the automated facilities of a [[data dictionary]], or by the inclusion of explicit [[application program]] validation logic of the computer and its application.
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