SAP ABAP Data Element WER_MSG_FILTER (Byte sequence of length 3 for filtering messages) is used by

• Class (4)
• PINF (2)

#	Object Type	Object Name	Object Description	Package	Structure Package	Software Component
1	Class	CL_WER_CONST	Constants	WER_UTILITIES	APPL	SAP_APPL
2	Class	CL_WER_MESSAGE_LISTENER	For listening and handling message publishing	WER_UTILITIES	APPL	SAP_APPL
3	Class	CL_WER_MESSAGE_PUBLISHER	Service class for publishing messages	WER_UTILITIES	APPL	SAP_APPL
4	Class	CL_WER_RULE_ENGINE	Rule Engine	WER_BUSINESS	APPL	SAP_APPL