SAP ABAP Data Element W3FILEEXT (File name extension) is used by

• Class (17)
• Function Module (2)
• Interface (2)
• Program (2)
• SOBJ (1)
• Table (2)

#	Object Type	Object Name	Object Description	Package	Structure Package	Software Component
1	Function Module	SMD_RFC_EXTENSION_GET	Read file extension from mimetype	SOLMANDOC	BASIS	SAP_BASIS
2	Function Module	SMD_RFC_MIMETYPE_GET	Read mimetype from file extension	SOLMANDOC	BASIS	SAP_BASIS