Welcome to Modeltron, the elements of systems modeling.
All tagged Activity
There is a nuanced difference between an Activity Final Node and a Flow Final Node on a SysML Activity diagram. The Activity Final Node, when reached, terminates the execution of the entire Activity. When the Flow Final Node is reached, all tokens (either Control or Object Tokens) are consumed, but Activity execution continues.
A Control Operator is a special type of Action Node which produces a control token on its output Parameter (i.e., activity parameter or action pin). It is commonly used to dictate (i.e., control) the flow of Object Tokens in an Activity. Similarly, it can be used to disable Object Token flow.
Probabilities may be applied to control flows and parameter sets on an activity to indicate the likelihood the path of the control flow will be taken or the probability the parameter set will receive values.
Activity Parameters may be bundled together into Parameter Sets. Only one Input Parameter Set may hold tokens and only one Output Parameter Set may hold tokens on an Activity, although a single Activity Parameter may belong to more than one Parameter Set.
If an Object Node is typed by a Block which possesses a state machine, then an Object Node, Activity Parameter, or Action Pin typed by that Block can require that the State Machine exist in a certain state before an Object Token may be passed.
In SysML, a «block» is an element of classification. The «block» defines system structure, but may also possess behavior.
