SAP ABAP Data Element KZKEY (Key field classification) is used by

• Table (3)

#	Object Type	Object Name	Object Description	Package	Structure Package	Software Component
1	Table	SFAUSWTAB - KZKEY	Field Selection Data for Material Master	MGA	APPL	SAP_APPL
2	Table	ST130F - KZKEY	Structure: T130F Extended to Include Table Name, Field Name	MGA	APPL	SAP_APPL
3	Table	T130F - KZKEY	Field attributes	MG	APPL	SAP_APPL