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Field Validation

Validation attributes specify how data entered into the field is to be validated. Validation includes both the attributes supported by i OS, such as uppercase lowercase checking, modulus checking, i OS valid name checking, and validation through a check condition. You can define additional field validation logic for any field type and automatically incorporate it in any function using the field.

For more information about field type, see Defining a Data Model, Using Fields topic in the chapter "Understanding Your Data Model."