pool::Container Node1 pool::Container - m_name - m_fileDescriptor - m_technology + Container() + ~Container() + name() + technology() + tokens() + technologySpecificAttributes() + technologySpecificAttributes() # attributeOfType() # setAttributeOfType() Node2 pool::IContainer   + name() + technology() + tokens() + technologySpecificAttributes() + technologySpecificAttributes() + ~IContainer() Node2->Node1 Node3 pool::ITechnologySpecific Attributes   + attribute() + setAttribute() # ~ITechnologySpecificAttributes() # attributeOfType() # setAttributeOfType() Node3->Node1