If the call is declared asynchronous, both bits would be set to 0. So the second byte must only be sent, if the default should be changed. 1 A reply for this request MUST be sent after the request finishes. A reply for this request MUST NOT be sent. It is an index over all methods including superinterfaces.
All attributes always appear before normal methods.
A read-only attribute counts as one method, a readwrite attribute counts as two methods. If signaled by the flags, the message header is followed by the new oid, new type and new ThreadId. The request has returned normally. The thread, that has executed the request, is different from the last one that sent a request or a reply. The thread, that has executed the request is the same, that has sent a reply or a request before.