Looking at ADL User Guide v6.21:
The examples at the end of the “Outgoing Commands” section show “*” used to specify the subscribed responses
The examples do not explain the meaning of “*” here, and the descriptions of the API calls don’t even mention it at all.
One is left to guess that it means, “all responses”
One is also left wondering whether it might be usable as a “wildcard” in match strings…?