188.8.131.52.1 Causal Ordering
These extensions allow for higher-level protocols to issue method calls that are said to be causally ordered. If any two method calls N and N+1 are specified to be causally ordered on the client, these extensions MUST ensure that N is dispatched before N+1 on the server. On the client, the exact way in which method calls are specified to be causally ordered is implementation-specific. On the server, the exact way in which dispatch of N is determined to be complete so that N+1 can be dispatched is also implementation-specific.