Dear Sambit,

                      These Research Papers may help you.

Sambit,

you should give a look to the OCCI group of the Open Grid Forum. Basically, they propose a standard to describe cloud resources in general,and there is a specific extension for traditional cloud resources (IaaS). You find the papers at

http://www.ogf.org/documents/GFD.183.pdf

http://www.ogf.org/documents/GFD.184.pdf

New releases of the docs are going to be published soon, but they are smooth changes.