Dynamic and static subsets
Static subsets are unchanging lists of elements but dynamic subsets are based on variable criteria such as attributes.
For example, you could define a dynamic subset for the products dimension as "All products that have sales in Germany in any given month of more than 5000 units". This subset automatically expands as new sales results are added to the cube.
Create static subsets in the Dimension Browser by saving a selection as subset, or by using the Subset Wizard.
See these topics: