Now let’s enrich the contact application to include an address for each contact. As an exercise, create the application's Address class using the Studio New Caché Class Definition wizard:
Use Terminal to delete all of the existing Contact instances. Use the following command:
USER>Do ##class(ContactDB.Contact).%KillExtent()
Use Terminal to re-populate Contact with contacts that also have address data. Use the following command. Note that the population utility will automatically assign address data to the new contacts.