Ariba Sourcing and SAP ECC integration using SAP PI

Hi,

Please share any documentation available on integrating SAP ECC master/transaction data with Ariba Sourcing using SAP PI.

Also Procure to Pay/Procure to Order Integration Tool Kit provided for SAP PI can be used for sending master data CSV/ZIP files to Ariba Sourcing and spend visibilty as well ?

or is there a seperate Ariba Sourcing/Spend Visibilty integration toolkit for SAP PI ?

Thanks