Chapter 5 Building Dynamic Diagrams

Starts

A start is the starting point of the whole process represented in an activity or statechart diagram. Its symbol is a solid circle as shown below:


A start can be created in the following diagrams:

You should not use the same start in a statechart and an activity diagram. Use a separate start for each diagram.

You can create several starts within a package or a model since you may use several activity and statechart diagrams in the same model or package, but only one start is allowed in each diagram. As per the decomposed state, you can only create one start in the default sub-statechart or sub-activity diagram.

For this reason, the Start tool is grayed in the palette if a start symbol already exists in the current diagram. Pasting a start is also forbidden if a start already exists in the statechart or the sub-statechart diagram.

You are not allowed to use shortcuts of starts.

Note   Merging models
The start is compared and merged in the Merge Model feature. Since starts should be unique in decomposed states, the Merge Model feature checks that there is no additional start in a decomposed state.

 

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