SAP ABAP Program RADTB002 (Read Routines for Table Header) is using

• Table/Structure Field (5)
• Table (3)

#	Object Type	Object Name	Object Description	Note
1	Table	DD02L	SAP Tables
2	Table	DDREFSTRUC	DD: General Reference Structure in ABAP Dictionary
3	Table	DDTYPES	Table of all Dictionary types and classes