SAP ABAP Class CL_COM_HIERARCHY_SCHEME (Category Numbering Scheme) is using

• Class (5)
• Data Element (5)
• Table/Structure Field (29)
• Function Module (1)
• Message Class (12)
• Message Number (12)
• Class Method (10)
• Table (19)

#	Object Type	Object Name	Object Description	Note
1	Function Module	GUID_CREATE	Create GUID ('globally unique ID')