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ABAP Keyword Documentation → ABAP − Reference → Declarations → Declaration Statements → Classes and Interfaces → INTERFACE → INTERFACE intf →INTERFACE - components
The following declaration statements are possible for components:
The only interface components that can be addressed without implementation of the interface in classes are data types and constants. These can be addressed using the name of the interface and the class component selector (=>).
Note
All components of an interfaces are in one namespace. Within an interface, the name of a component must
be unique, regardless of its type (data type, attribute, method, event , or alias name). The components
of an included interface are identified by the prefix intf~ (name of the interface with interface component selector).