Questions about interface with SAP and SAP Ariba network

and I found SAP has exactly same solution which is "Invoice Management Solutions”.

http://go.sap.com/solution/lob/sourcing-procurement/invoice-management.html

It is using SAP Ariba network for allowing vendors to upload and manage invoices.

I would like to know what kinds of web platform “Invoice Management Solutions” are using and

how this solution interface with SAP other module such as FI, MM.

Thank you.