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The VisitorFieldValidator allows you to forward validation to object properties of your action using the object's own validation files. This allows you to use the ModelDriven development pattern and manage your validations for your models in one place, where they belong, next to your model classes. The VisitorFieldValidator can handle either simple Object properties, Collections of Objects, or Arrays.
In the example above, if the acion's getUser() method return User object, XWork will look for User-myContext-validation.xml for the validators. Since appednPrefix is true, every field name will be prefixed with 'user' such that if the actual field name for 'name' is 'user.name'