Reg : SRM Complete Flow

Hi Experts ,

1)

I am working on SRM 7.0 and I was new to SRM . Now the thing is I want to know each and every thing about SRM .That is when a shopping cart will come into picture and RFx and BIDDER and all the cycle manner .So please help me in to find a way to know all this things in SRM .

2)

Other than this I want to know the architecture of SRm .

3)

All about CLL layer PDO layer and PD layer and about Metadata Concept

Thanks

sandeep