SAP ABAP Domain UDCHA4 (4-position character field without check) is used by

• Data Element (10)

#	Object Type	Object Name	Object Description	Package	Structure Package	Software Component
1	Data Element	HRSP_INPUT_CHOICE	Select shifts or availabilities	PP08	HR	SAP_HRGXX
2	Data Element	HRSP_INPUT_OPTION	Shifts during period: Standard options	PP08	HR	SAP_HRGXX
3	Data Element	N1PDLEBG	PERINAT: Lebendgeburten	N1PD	IS-HMED	IS-H
4	Data Element	TEXT4	Text field, length 4	SCTS_BAS	BASIS	SAP_BASIS
5	Data Element	UDBEMERK	Comment	SDUM	BASIS	SAP_BASIS
6	Data Element	UDEATYP	Attribute type	SDUM	BASIS	SAP_BASIS
7	Data Element	UDINFENTR	IM interface entry flag	SDUM	BASIS	SAP_BASIS
8	Data Element	UDINFOK	IM interface SAVE_OK_CODE	SDUM	BASIS	SAP_BASIS
9	Data Element	UDINFRTRN	IM interface return code	SDUM	BASIS	SAP_BASIS
10	Data Element	UFFKT_REL	EFM: Release	SDFM	BASIS	SAP_BASIS