Which rule would you specify to ensure a U.S. postal code consists of five digits?

To ensure that a U.S. postal code consists of five digits, specifying an edit validate rule in the property used by the text field is the appropriate approach. An edit validate rule allows developers to define specific criteria that the property value must meet before it is accepted. In this case, a postal code needs to be exactly five digits long and consist solely of numeric characters, making this rule ideal for enforcing that requirement.

The edit validate rule can leverage regular expressions or other validation logic to ensure that the input adheres to the specified format, verifying that only five numeric digits are entered. This ensures data integrity and compliance with postal code standards.

While the option regarding character min/max settings might restrict the input length, it does not ensure that the input is strictly numeric or that it meets the specific five-digit requirement accurately. Using an integer property type could allow for numeric entry, but it wouldn't enforce the five-digit restriction adequately, as it doesn’t validate the character count directly. Lastly, while a validate rule could also be used, it is not as explicitly focused on format validation as an edit validate rule, which specializes in assessing user input in real-time before submission.