SAP ABAP Program L2012F21 (External Services Management: Interface -> Internal Structures) is using

• Class (5)
• Data Element (1)
• Table/Structure Field (59)
• Function Module (7)
• Interface (3)
• Message Class (1)
• Message Number (1)
• Class Method (6)
• Table (21)

#	Object Type	Object Name	Object Description	Note
1	Class	CL_EVENT_MM	Event Handling
2	Class	CL_MESSAGE_MM	Message
3	Class	CL_MMPUR_CONSTANTS	Constants Purchasing
4	Class	CL_MMPUR_MEPO_DB_UTILITY	MEPO Database Accesses
5	Class	CL_PO_ITEM_HANDLE_MM	Item of a Purchasing Document