|Description||string||This assocation makes explicit the routes that are calculated by a specific RouteCalculationService. Thus, every RouteCalculationService can have its own unique set of calculated routes. The association is not necessary in the model and has been deprecated. An instance of the general ConcreteDependency association can tie a NextHopIPRoute to a RouteCalculationService. In addition, information on how the route was derived is available in NextHopIPRoute's RouteDerivation enumeration.