UML Activity Diagrams

UML deployment diagram in Altova UModel

UModel Activity Diagram Features:

  • Toolbar for quick access to activity diagram elements
  • Fork nodes, join nodes, and activity partition elements in both horizontal and vertical orientation
  • Pull-down menus to set characteristics of input pins, output pins, and value pins
  • Special activity diagram entry helpers and fast editing buttons
  • Elements can be assigned to diagram layers and selectively viewed or hidden
  • Unlimited undo/redo encourages exploring new ideas

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Activity Diagrams Chart the Flow of Actions and Illustrate Decision Points in Your Project

You’ll find the features of UModel® 2017 to be advantageous and versatile as you draw UML activity diagrams to chart the dynamic behavior of your project. The UModel activity diagram toolbar includes fork nodes, join nodes, and activity partitions in both horizontal and vertical orientation so you can select the element you need in a single step.

If you want to formally indicate the semantics of activity initializations, the input pin, output pin, and value pin elements are similarly organized. When you place a pin, the Properties dialog offers pull-down menus to set all its characteristics.

The UML 2 specification greatly expanded the features and scope of activity diagrams beyond their earlier classification as a special case of state diagrams. Today, activity diagrams are flow charts for the 21st century, and UML modelers use activity diagrams to describe business rules, single use cases, a complex series of multiple use cases, processes with decision points and alternate flows, operations that take place in parallel or software flows and logic control structures.

Whether you are an analyst assigned to diagram business rules, or a developer who needs to document all the subtle features of an embedded system, UModel makes it easy to draw UML 2 activity diagrams that chart the dynamic behavior of your project and communicate your designs accurately and effectively.

Swim lanes in a UML activity diagram in Altova UModel

Swim Lanes

Separate toolbar buttons let you insert horizontal or vertical swim lanes (activity partitions), but if you start with one orientation and decide you would rather use the other, the flip fast editing button changes the orientation so you don’t have to start over from scratch.

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