If the multiplicity is well defined (such as 1 or 5), IBM® Rational® Rhapsody® creates the components at run time, when the composite is instantiated. If an association is instantiated by a link, the product initializes the association at run time.
When a composite is destroyed, it destroys all its components.
Because a composite class is a container class, you can create objects and relations inside it. A composite class uses the same Features window as objects and parts. Another way of having the functionality of a composite class is to use a composition.