UML Designer User's Guide

Adding objects to a sequence diagram

Three objects are involved in the "Adding a book" scenario:

To add these objects to the sequence diagram, follow these steps:

  1. Select Object figure icon Object from the tool bar.
  2. Use mouse button 1 to place the new figure near the left edge of the drawing surface (adjacent to the system activation).

    An object figure appears by default as an icon at the top of the drawing surface with a dashed lifeline extending downward. The vertical placement of the mouse pointer does not matter when you add a new object to a sequence diagram; only its horizontal position is important.

  3. Select Attach from the pop-up menu of the new object figure.
  4. When prompted, select Library as the class design to link to. UML Designer automatically creates a new instance element for the class design you select.
  5. Select OK. The object figure is now labeled Library.
  6. Repeat the same procedure for the other two object figures, attaching them to Catalog and CatalogEntry respectively.

Sequence diagram illustration (1)


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