Fill out the remaining required fields and submit.
The tag file defines two attributes: the name of the required field and an optional error message.
Preferably, use instructional text to indicate required or optional fields, but asterisks also work for required fields.
Try leaving a required field blank or putting an invalid date into a date field, and you'll see those errors when you try to save, as shown in Figure 6-5.
Reminder: if the customer required field house, can inform the customer service staff to your schedule, and leave your telephone number.
Validation controls enable you to check for a required field, to test against a specific value or pattern of characters, to verify that a value lies within a range, and so on.
Common Name is a required field and is typically used as the most granular level of identity.
Required field validation: Omit some of the required fields and make sure system gives proper error messages.