Perspectives and translations are two features that are supported only in the Enterprise Edition of SSAS. They allow you to create custom views of a cube. Perspectives allow you to create view-like subsets, and translations allow you to associate alternate metadata labels for cube, dimension, and other object names (such as KPIs).
A perspective is a named MDX query that appears to the end user as if it were a separate cube. Much like a view in a relational database, perspectives are simply subsets of a the features of a cube. When deciding whether to use perspectives, consider the following: