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Structured Activity
Description
Structured Activity elements are used in Activity diagrams. A Structured Activity is an activity node that can have subordinate nodes as an independent Activity Group. You can set an option to ensure that no other Activities or their side effects interfere with this Activity's processing (the Must Isolate checkbox in the Structured Activity element Properties dialog).
Enterprise Architect provides a number of forms of Structured Activity, both basic and specialized, for creating composite Activity elements quickly and simply.
Access Diagram | Diagram Toolbox | More tools... | UML | Activity
Topic |
Description |
See Also |
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Create Structured Activities |
When you drag a Structured Activity icon from the Toolbox onto a diagram, a short menu displays from which you select one of the following options:
The first two options specifically create a Loop Node or Conditional Node. The Other option displays the New Structured Activity dialog, on which you can select to create one of the five following types of Structured Activity element.
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Simple Composite Activity |
Provides a Composite Activity element with a child Activity diagram. |
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Loop Node |
Represents a sequence of Actions and Activities that are to be repeated within the object.
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Conditional Node |
Represents an arrangement of Actions and Activities where choice determines which Activities are performed.
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Structured Activity Node |
Represents an ordered arrangement of executable Activity nodes (Actions, Decisions, Merges and so on) that can include branched and nested nodes; this is the base element from which the other types of Structured Activity are derived.
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Sequential Node |
Represents a sequential arrangement of executable Activity nodes.
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Nodes as Composite Elements |
Loop Node and Conditional Node elements are composite elements, but the child element structures are created on the same diagram as the node element itself (in the same way as for a Composite State). Therefore:
You could set these nodes as 'normal' composite elements and create and open a child diagram, but you should not use Loop or Conditional Nodes in this way. The Show Composite Diagram facility is also not available on the Structured Activity Node, as this is the base element for the Loop and Conditional Nodes. You can, however:
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Notes
| • | To protect the processing of a Loop or Conditional Node Structured Activity from interference from other Activities or their side effects, open the element's Properties dialog and select the Must Isolate checkbox on the Loop or Condition page |
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