SAP ABAP Domain EDI_REFNUM (Reference number) is used by

• Data Element (10)

#	Object Type	Object Name	Object Description	Package	Structure Package	Software Component
1	Data Element	EDI4REFGRP	Message group (EDI Message Group)	SED	BASIS	SAP_BASIS
2	Data Element	EDI4REFINT	Transmission file (EDI Interchange)	SED	BASIS	SAP_BASIS
3	Data Element	EDI4REFMES	Message (EDI Message)	SED	BASIS	SAP_BASIS
4	Data Element	IDOCCRFGRP	Reference to message group	SED	BASIS	SAP_BASIS
5	Data Element	IDOCCRFINT	Reference to interchange file	SED	BASIS	SAP_BASIS
6	Data Element	IDOCCRFMES	Reference to message	SED	BASIS	SAP_BASIS
7	Data Element	IDOCSRFGRP	Reference to message group	SED	BASIS	SAP_BASIS
8	Data Element	IDOCSRFINT	Reference to interchange file	SED	BASIS	SAP_BASIS
9	Data Element	IDOCSRFMES	Reference to message	SED	BASIS	SAP_BASIS
10	Data Element	NWCH_REFMES	Referenz auf Nachricht (früher EDI_REFMES)	NCH1	IS-H	IS-H