Data validation determines whether captured data complies with the data integrity rules that are defined in your business requirements.
For example, when you established the business rules for the TravelDocs application, you tested if the cost fields are in a valid currency format. If the car type on the rental agreement page is one of a set of predefined values. And if the total cost on the air ticket page equals the air fare plus taxes.
A validation failure does not necessarily mean that the original page contains invalid data. It might mean that the recognition engine failed to recognize one or more characters correctly. You can change the status of the page, which contains the data that failed validation. This change ensures that the page is displayed to an operator for verification.
