service_name Parameter
Data Type: String
This parameter specifies the URL of the Web site that a method should act upon, but it has been largely deprecated in Microsoft Windows SharePoint Services. While RPC methods may still require the presence of this parameter, they might not act upon its value.
When used with the create service, remove service, and rename service methods, the service_name parameter must specify the server-relative URL of the site to act upon. For example, to create the Web site http://server/site1/site2, make the POST to http://server/site1/_vti_bin/_vti_adm/admin.dll and set the service_name parameter to /site1/site2.