Using Custom Subject Area Variables in Filters
Variables set in the Column Label of a Custom Subject Area are resolved when used as Filters in a published dashboard.
For example, you can create a static system variable called "MyCategory".
Use the variable in an expression as the label for a Custom Subject Area (CSA) attribute "Category Type".
You can create a new filter, navigate to the expression label in the CSA, and set its properties.
The label displays in the Filters editor as its expression was entered for the label property.
End users can then see the resolved value of the variable, "MyCategory", instead of the data store label "Category Type".