In DataFlex, business rules that centrally define table relationships and manage database operations are contained in "Data Dictionaries," a core component of the application framework. Data Dictionaries validate database operations to ensure data quality and integrity. They also enforce user interface consistency by defining data’s default visual representation across all devices. Changes made to Data Dictionaries propagate throughout web, mobile and Windows applications. With one central repository for business rules, building and maintaining applications with DataFlex is faster and easier and data quality is maintained.