C1 OnRamp helps suppliers implement Commerce One's RoundTrip protocol by providing services that let you map buyers' shopping cart data to RoundTrip-compliant forms. (The RoundTrip protocol is identical to SAP's Open Catalog Interface (OCI) protocol.)

C1 OnRamp provides services you use to build RoundTrip response services. RoundTrip response services create RoundTrip responses from buyers' shopping carts and convert the responses into HTML or XML you can imbed in the HTML forms you display on the buyers' Web browsers. The forms specify a URL that points the buyer application and provide a Submit button. When a buyer clicks the Submit button, the buyer's Web browser submits the form to the specified URL.