Could any one tell me,what is external hierarchy, presentation hierarchy and what it mean interface node.plz any one send the nice material for hierarchies.
External hierarchies are hierarchies in the BW system.
Presentation hierarchies is the same as a multi-characteristic drilldown but rather than separate columns for each characteristic, the presentation is made in the form of a hierarchy. When one node is opened, data shown is from the next characteristic in the drilldown. Basically each characteristic is a like a level in a hierarchy.
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