Publication Date:
2003
abstract:
This chapter, after a brief discussion regarding the abstraction process which
created a hierarchy, gives an overview of the related works on the basic
concepts of the different types of aggregation hierarchies, discussing the
hierarchies from two different points of view: mapping between domain values
and hierarchical structures, introducing the characterization of some OLAP
operators on hierarchies and giving a set of operators that concern the change
in the hierarchy structure. Finally, it proposes an enlargement of the operator
set concerning hierarchies.
Iris type:
02.01 Contributo in volume (Capitolo o Saggio)
List of contributors: