Specifies how the lifecycle of the roles are related. Composition = the other role forms part of this element and no other, ...

Specifies how the lifecycle of the roles are related. Composition = the other role forms part of this element and no other, and is typically created and destroyed with it; Shared = instances at the other role can be shared between more than one owner; None = the roles are related without specifying a lifecycle dependency. Default = none.