In Rational® XDE,
you can place guard conditions on sequence diagram messages, interaction references,
and local actions. However, in UML 2.0, this construct has changed and is
now called a combined fragment.
Interaction
references before import
In the following figures, the before figures represent XDE, while
the after figures represent the same diagram or construct in the Rational modeling
products after import.
Note: Call actions and guard conditions on sequence
(interaction) diagrams import as comments. By default, after import, call
actions and guard conditions do not appear in the diagram editor.
For
additional information, refer to the combined fragments help topic.

Interaction references after import
There are several
things to understand about the imported diagram below:
- The diagram below was slightly manipulated after import to properly show
the optional call to LocalAction1.
- Constraints and text do not show up at precisely the same Y-coordinate
as they did in XDE; however, their position should be close.
- Note attachments (the dashed arrow) do not show after import if the attached
shape resides in a nested scope (inside a combined fragment).
