SA Workbook > Dataset > Filters: There is an option to 'Show Hierarchy' with a message:

Note: Filters created at the parent level of a hierarchy are applied to all children in the hierarchy.

My interpretation of this is that I can select a parent item, and it will include the children. However, my data set is not returning an inclusive list. Has anyone here seen this work as described? Or is it possible that I'm misinterpreting this?