The trace variable allows you to perform method invocation tracing for a specific service. For more information, see Method Invocation Tracing.

The domain name mentions the name of the domain from where you want this method to be invoked.

The marshallingType variable identifies the marshalling type to be used for a specific service, as described in Marshalling Data. To use a reference ID to marshall data, choose refid. To actually send data in the form of an XML file, choose xml.

The instanceID variable identifies a particular session for object instances using a Session class lifetime, as described in Managing Class Lifetimes. On the first invocation, the instanceID variable should be set to a value zero. If a Session lifetime is configured for an object instance, on subsequent invocations, you should set the variable to the instance ID returned from the first invocation of the method.