SysMLv1: MagicDraw/Cameo: GOTCHA: If you DRAG a Signal onto a Block symbol it will create a Reception. One way to create a Property typed by a Signal is to use a composite Association. Or just create an untyped Property then type it by the Signal.

If you use drag n' drop of a Signal onto a Block symbol in Magic Cyber-Systems Engineer ^® (Cameo Systems Modeler^®) you'll get a Reception, which might not be what you want.

One way to get a Property typed by the Signal is to use a composite Association from the Block to the Signal. If you don't want an Association, create an untyped Property on the Block in the model browser then either assign the Signal as its type using the spec dialog, or drag the Signal onto the Property line in the Block symbol on a Diagram. The Property typed by the Signal will then list under the properties compartment on the Block symbol.

Please note also:

Cameo Simulation Toolkit DOES NOT leverage a Reception on a Class/Block at all! Use an AcceptEventAction with a SignalEvent trigger or an 'effect' on a Transition instead. There is a formal fUML restriction that a Reception should not have a method.

fUML-1.4: 'fUML-1.4: 7.6.2.1: Reception: [1] fuml_reception_no_method: A reception must not have an associated method.self.method->isEmpty()'

SysMLv1: CAUTION: Only a Signal can be used for a SendSignalAction or MessageEvent trigger of an AcceptEventAction, not a Block or ValueType, even if they are valid types for a SysML FlowProperty! But you can "wrap" a Block or ValueType in a Signal.

SysML: Whether you use a Block, ValueType, or Signal to represent something that flows (and can be applied to an ItemFlow) depends on what you want to achieve. If you want to indicate something structured with value properties with Units use a Block.

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