Standard Hierarchy identifier (as opposed to Cost Centre Group)

Within the tables SETHEADER, SETLEAF, SETNODE with setclass = 0101 I can identify the relationships between Cost Centres & their associated hierarchies.

All nodes/ groups are defined in here i.e. both those from the standard hierarchy & also those created as alternates (Cost Centre Groups).

How do I differentiate between the two i.e. is there a way to select only those nodes that are part of the standard hierarchy ?

Thanks