How is validation typically handled in a Domain Model within Mendix?

In a Domain Model within Mendix, validation is commonly implemented through entity attributes and relationships. This approach allows developers to define specific validation rules directly on the attributes of entities, ensuring that data integrity is maintained automatically within the application.

For instance, when you set an attribute as required, the Domain Model will enforce that a value must be provided before an entity can be committed to the database. Similarly, relationships can enforce referential integrity by ensuring that associated entities meet specified criteria, such as one-to-many or many-to-many relationships. By utilizing these built-in capabilities of the Domain Model, Mendix allows for a streamlined and efficient method of data validation, minimizing errors and maintaining consistency.

The other options do not align with the typical practices for validation in Mendix. External scripts may provide additional validation options but are not the standard method. Manual entry verification relies on human oversight, which can lead to inconsistencies and errors. The assertion that validation is not applicable in a Domain Model is incorrect, as validation is fundamental to ensuring data quality in any robust application development framework.