serverName | SAP system used as a repository. This name must match a configured RFC connection alias at Adapter for SAP. |
$rfcname | Optional. Function module for which you want to create the template. |
$encoding | Optional. Specifies the encoding used in the output document's XML header, e.g. iso-8859-1 |
$call | Flag indicating whether pipeline represents a request or response of a function module. Possible values are:  true for request.false for response. |
$envelope | Optional. XRFC, bXML, or SOAP. Specifies the type of document generated. |