Data objects from the same ABAP program Data objects in operand positions are modified (
writer positions) or read (
reader positions). In some read positions, functions and expressions can be specified instead of data objects.
Types from the same program or the repository Types such as data types, classes, or interfaces are specified in
declarations,
typings, or when addressing components.
Callable units from the same program or the repository Callable units such as ABAP programs,
procedures, or
dynpros are called when a statement is executed.