OT: NG Multicast VPN

Dear Experts,

I have been trying to go through Multicast Enabled Applications book mainly
the Multicast VPNs where both the Draft Rosen & the Next Generation
Multicast VPN (BGP/MPLS) however wasn't able to fully digest those.

Anyone can share a good reference document where both models are explained
in full detail.

Thanks

-- 
KJ
Blogs and organic groups at http://www.ccie.net