When loading DCE data from User Source Tables, the Files Definition and View Definition files are created automatically from the User Source Table Definition. The name of the generated Files definition is the same as the IDT name in the

CREATE_IDT

clause. The View names(s) are created by concatenating the IDT name with a sequence number starting from 1.

When loading DCE Tables from flat (external) files, the File and View definitions must be hand-coded. The File definition describes the layout of the IDT, while the View Definition describes the layout of the input file.