Transaction code for SRM Web UI?

Hi SRM folks,

Can anyone help me to know -whether SRM 7 has web UI functionality like CRM 7.0?

If yes-

1) what's the transaction to access WEB UI via SAP backend(e.g. in CRM we have CRM_UI)?

2) Do we have concepts of business roles that need to be mapped to PFCG roles? (as in CRM 7.0)

3) any good SAP SRM material/course/training handbook contains details of Security aspects in SAP SRM(including UI technology)

Thanks & Regards,

Naveen