Essbase varying attributes and how they assist you in Analysis
By Torben Hein -Oracle on May 22, 2012
I just found this rich article in the trainers section blog at oracle.com.
It talks in length about the use of varying attributes in Essbase and how they are used.
So in case you have missed this new feature of the 11.1.x codeline, you are now lacking one excuse not to use it. : )