I've just posted a new video that shows the use of Data Source Views (DSVs) in an Analysis Services project. DSVs are a logical view of the schema and are the only thing a cube can actually see. As far as a cube is concerned, the DSV is the data source. This video discusses how to maniuplate the schema in a DSV through the use of named queries, named calculations, and so on. The video runs 21 minutes.