SAP ABAP Data Element EXTNUM (External order or planned order number) is used by

• Function Module (5)
• Table (2)

#	Object Type	Object Name	Object Description	Package	Structure Package	Software Component
1	Function Module	CO1N_EXTNUM_READ VALUE(EXTNUM) LIKE CLOIMAPTMP-EXTNUM	Read external number for temporary or internal number	COIF	APPL	SAP_APPL
2	Function Module	CO1N_INTNUM_READ VALUE(EXTNUM) LIKE CLOIMAPTMP-EXTNUM OPTIONAL	Read internal number for external or temporary number	COIF	APPL	SAP_APPL
3	Function Module	CO1N_MAPPING_ADD VALUE(EXTNUM) LIKE CLOIMAPTMP-EXTNUM OPTIONAL	Add a mapping entry between external and internal number	COIF	APPL	SAP_APPL
4	Function Module	CO1N_MAPPING_MODIFY VALUE(EXTNUM) LIKE CLOIMAPTMP-EXTNUM OPTIONAL	Modify a mapping entry between external and internal number	COIF	APPL	SAP_APPL
5	Function Module	CO1N_TMPNUM_READ VALUE(EXTNUM) LIKE CLOIMAPTMP-EXTNUM OPTIONAL	Read temporary number for external or internal number	COIF	APPL	SAP_APPL