Defined constraints that data or input must satisfy to be accepted, used to enforce correctness, consistency and integrity before processing or storage.
Semantic Classification
Content
- Validation rules specify the conditions data must meet, such as type, range, format, uniqueness or cross-field consistency, and reject or flag input that fails them. They are applied at user interfaces, application logic and database layers to keep data trustworthy.
- Expressed declaratively or as procedural checks, validation rules reduce errors and security risks from malformed input, and they form part of broader data quality and business rule management practices.