If the reply Message has a signature, then wildcard arguments are provided for all return, out and inout ownedParameters of the signature Operation. Source Unified Modeling Language 2.5.1
Note that the parentheses are not considered part of the output-argument list, so a reply-message-label without an output-argument-list may still optionally include an empty set of parentheses (“()”) after the message-name. Source Unified Modeling Language 2.5.1
If a reply-message-label does not include an output-argument-list and the Message has a signature, then this denotes that the Message has wildcard arguments corresponding to all out and inout ownedParameters of the signature Operation (if any). Source Unified Modeling Language 2.5.1
A decisionInput Behavior has no out parameters, no inout parameters, and one return parameter. Source Unified Modeling Language 2.5.1
zero_input_parameters If the DecisionNode has no decisionInputFlow and an incoming ControlFlow, then any decisionInput Behavior has no in parameters. Source Unified Modeling Language 2.5.1
