You can show attributes as association relationships
in diagrams.
You must be in the C/C++ perspective and have
a diagram open in the diagram editor.
To show an attribute as an association:
In the diagram editor, right-click an attribute;
then click .
The attribute is removed from the classifier and appears
as an association relationship in the diagram.
Tip: You can also drag and drop an attribute
outside the classifier to show the attribute as an association.