SAP ABAP Data Element OBLRELTYPE (Relationship type) is used by

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• TTYP (1)
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#	Object Type	Object Name	Object Description	Package	Structure Package	Software Component
1	TTYP	/SCMB/DF_RELATION_TYPE_TBL	/SCMB/DF_RELATION_TYPE_TBL	/SCMB/FLOW_CUSTOMIZING	/SCMB/FLOW	PI_BASIS