Chapter 4. Validation, Calculation, Navigation, and Lists

If you have been reading this book sequentially, you have an application that was built with a lot of default functionality, and you have modified that default application to increase ease of use and protect data integrity.

This chapter will take your application farther, in several ways. You will learn how to add logical checks on data validity before allowing the data to be added to your database. You will learn how to easily add more information to existing reports by including calculations in the reports. And you will learn all about how to specify navigation in your application and how your navigation can be used to model business processes you are supporting, increasing the productivity of your users.

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