This Recommendation | International Standard provides a model for characterizing the relationship between resources in terms of the way one or more resources may provide a back-up role for other resources. This includes the hot/cold standby concept and the associated aspects of primary and secondary back-up. The capability to manage the relationships is provided, for example, to allow a system to issue a request to another system to change over the resources acting in a back-up role or to change back. The relationships and requests are defined in terms of the managed objects representing the resources.