SAP ABAP Program IDOC_LISTEN_F02 (form routines for building the tree) is using

• Class (10)
• Data Element (1)
• Table/Structure Field (22)
• Function Module (1)
• Class Method (12)
• Table (6)

#	Object Type	Object Name	Object Description	Note
1	Data Element	LVC_NKEY	ALV Tree Control: Node Key