Managing your data model Maintain data integrity by updating your data model when changes occur. Use the following techniques to update your data model resources: Defining the fields in a data type To define the structure of your data, add formatted fields to each data type. Changing the type of a field To store data in a different format, change the type of a field. Reusing data records Add a data reference list to your data model to refer to data records for a data type. Referencing data from another data type Create reusable data for your application and build easy to maintain forms by using a data reference. Adding a data reference to a form Add a data reference to a form to prompt users with a list of data records. By using data references, you integrate data with cases in your application.