You work with validation rules in the Database painter and DataWindow object painter.
In the Database painter, you can:
Create, modify, and delete named validation rules
The validation rules are stored in the extended attribute system tables. Once you define a validation rule, it can be used by any column of the appropriate datatype in the database.
Assign validation rules to columns and remove them from columns
These rules are used by default when you place the column in a DataWindow object in the DataWindow object painter.
In the DataWindow painter, you can:
Accept the default validation rule assigned to a column in the Database painter
Create an ad hoc, unnamed rule to use with one specific column
Once you have placed a column that has a validation rule from the extended attribute system tables in a DataWindow object, there is no longer any link to the named rule in the extended attribute system tables.
If the definition of the validation rule later changes in the extended attribute system tables, the rule for the column in a DataWindow object will not change.
