We are looking at line item level integration from Ariba to ECC? Do we have standard integration around this? Also we have a scenario where a contract is distributed to multiple Purchasing Organization and Company codes.
In Ariba contracts we store the line items in the contract terms document. To send this to ECC you need to do the following:
Download Contract Terms web service to export the Excel file to the customers middleware. The middleware would be parsing this Excel and change it to create the line item information in the ECC application.