BRF Workflow Concept (mySAP SRM)

Hello SRM Gurus...

Wanted to know abt the new concept of BRF Workflow Concept (mySAP SRM) in srm 7.0,this has changed from the earlier versions on SRM 4.0 or 5.0 which were application wf's

Need some detailed documents on this part.how this is configured,

How this is differnet from the earlier WF conecpts

any good pointers appreciated.

Arshad