Please note : This help page is not for the latest version of Enterprise Architect. The latest help can be found here.
Structured and Sequential Nodes
On a diagram, Structured and Sequential Activity Nodes have broken borders and composite diagram icons, as shown below:

To display the Activity diagram represented by a Structured or Sequential Activity Node element, double-click on the element.
Structured Activity Node elements can point to child diagrams that themselves contain or consist of Structured Activity elements; that is, the Structured Activity elements are nested, as shown in the section of Project Browser below.

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