Example - Union Of Excluded And Cloaked Categories In The Same Dimension; Example - Union Of A Custom Views With Omitted Dimensions - IBM Cognos User Manual

Example - Union of Excluded and Cloaked Categories in the
Same Dimension
This example describes a dimension with custom views that include excluded and
cloaked categories.
Custom view A: exclude United States, cloak Mexico
Custom view B: cloak Boston
In each custom view, Boston is cloaked. Because custom view B is shown all
Region values and all categories except Boston, the union of the two custom views
eliminates the restrictions on all categories except for Boston for custom view A.

Example - Union of a Custom Views with Omitted Dimensions

This example describes the union of custom views with omitted dimensions.
Custom view A: omit Region dimension
Custom view B: omit Product dimension
Custom view A is not shown any category in the Region dimension, and this
dimension is omitted from the domain of any query formed by custom view A.
The PowerCube query engine replaces the gap with the root of the Region
dimension. Custom view A is shown all other dimensions, including the complete
Product dimension.
Custom view B is not shown any category in the Product dimension, and this
dimension is omitted from the domain of any query formed by custom view B.
The PowerCube query engine replaces the gap with the root of the Product
dimension. Custom view B is shown all other dimensions, including the complete
Region categories.
The union of these two custom views results in all categories of all dimensions
being shown. However, because a cell value is visible to the union only when there
is at least one custom view that can see all the categories in the cell domain, only
values of cells that are of the root of Region or Product are shown. Drill down
produces NA values.
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IBM Cognos Transformer Version 10.1.1: User Guide