Get Parameter in Web Service (EJB)

Hi,

we are using Salesforce as CRM-System and need to send data from Salesforce to SAP. In SAP we have a Web Service created by an EJB. To call the Web Service we use its WSDL file in Salesforce to pass by some parameter.

My question is how is it possible to get this parameter in our Web Service? Is there something like request or response?

regards,

Sharam