ALF — Synchronous action

Summary: A synchronous action is defined as a request where the sending
object pauses to wait for results. Synonym: synchronous request [OMA].

1) The OMA is not specific on this issue, but the understanding in
CORBA is that a request is only specific with respect to a thread.

• So, in UML, does the sending object truly pause to wait for results?
• Or is it just a thread of that object that pauses for results?
  (in that case, the definition should be clarified)

2) Another possible interpretation of a synchronous action is that
such a request is always associated with a response (contrarily to
an asynchronous request which has no associated response ?).
The sending object has then an obligation to collect that response.

If that interpretation was true, then synchronous action would
map to both synchronous request and def

Fixed in adopted spec