HR Tables: SWEHR2/3
ABAP Code user Exit: SWE_EVENT_CREATE
Change Document: SWEC
Status management:
Message Control:
EVENT Linkage: SWE2

SUBTYPE: KEY field cannot be created. Methods and attributes can be created.

Delegate: If you want to change the functionality of a method, define a sub type, redefine the method, delegate the parent business object to child object.

Interface: Interface is a combination of Attributes, Methods and Events, to reduce the redundancy in definition.

IFSAP: COMMON interface for all BOs. It has following methods
Method: Display
Method: EXISTENCE Check
Attribute; ObjectType

HR Tables: SWEHR2/3
ABAP Code user Exit: SWE_EVENT_CREATE
Change Document: SWEC
Status management:
Message Control:
Event Linkage: SWE2

Subtype: Key field cannot be created. Methods and attributes can be created.

Delegate: If you want to change the functionality of a method, define a sub type, redefine the method, delegate the parent business object to child object.

Interface: Interface is a combination of Attributes, Methods and Events, to reduce the redundancy in definition.

IFSAP: Common interface for all BOs. It has following methods
Method: Display
Method: Existence Check
Attribute; ObjectType