Like locators and fields, validation rules are inherited from parent and child classes. An inherited validation rule is read-only. The rule name appears in italic text and the rule icon is greyed out. You cannot edit the properties of an inherited single or multi-field validation rule. In most cases, inherited classes should behave the same way as the parent class.

Occasionally, you might need to modify a child to behave differently than the parent. To do so, select the "Activate validation rule" option for the single field or multi-field validation rule properties. This enables you change an inherited validation rule without affecting the parent or siblings that might have also use that rule.