UML Association Class Properties dialog box (Details category)

Visibility

Choose the type of visibility (public, private, or protected) that applies to the association class.

IsRoot

Select to indicate that the association class can't have ancestors.

IsLeaf

Select to indicate that the association class can't have descendants.

IsAbstract

Select to indicate that the association class is abstract and that no instances can be created for the association class.

IsActive

Select to specify that an object of the association class maintains its own thread of control.

Documentation

Type any documentation you want to add to the element as a tagged value. When you select the shape or icon representing the element, the documentation you type here also appears in the Documentation window.