Importing Application Data Set Classes
The Application Data Set classes are application classes, not built-in classes, like Rowset, Field, Record, and so on. Before you can use these classes in your PeopleCode program, you must import them into your program.
An import statement either names a particular application class or imports all the classes in a package.
Using the asterisks after the package name makes all the application classes directly contained in the named package available. Application classes contained in subpackages of the named package are not made available.