In this chapter, we focused on the basic building blocks of the NAV data structure: fields and their attributes. We reviewed the types of data fields, properties, and trigger elements for each type of field. We walked through a number of examples to illustrate most of these elements though we had postponed the exploration of triggers until later, when we had more knowledge of C/AL. We covered Data Type and FieldClass, properties which determine what kind of data can be stored in a field.

We reviewed and experimented with the date calculation tool that gives C/AL an edge in business applications. We discussed filtering, how filtering is considered as we design our database structure, and how the users will access data. Finally, more of our NAV Radio Show application was constructed.

In the next chapter, we will look at the many different types of Pages in more detail. We'll put some of that knowledge to use to further expand our example NAV application.