The purpose of the D_Customer data page is to get customer details. To view the data page, in the Dev Studio header search text field, search for and select D_Customer. In the Data sources section, you configure the source for this data page conditionally and you define the source using activities.
This data page loads the customer information based on the customer ID (set on the parameter page of the data page rule).
The D_Customer data page is an example of a data page that is used as the source of a property of mode page (Customer in the PegaIns- class).
It demonstrates you can only set the property for any case. The OwnerID and the data page are called to load the customer object into your clipboard.