by the SID business entities in service domain. The domain also includes agreement on the service levels to be offered, deployment, and configuration of services. Information definition for other service related activities like management of service problems, service usage, quality of ser- vice, and service planning are covered in service domain. 6. Resource domain: This domain has ABEs managing the definition, develop- ment, and operational aspects resources. The components of the infrastruc- ture and the products and services that use the infrastructure are covered in resource domain. Association of the resources to the products and services provides results in a detailed set of resource entities. The information models to perform planning, configuration, and monitoring are provided by SID in the resource domain. Supplier/partner domain: The data and contract operations associated with a supplier/partner are included here. It includes planning of strate- gies, handling of all types of contact, management of the relationship, and the administration of supplier/partner data. Data and contract operations related to the supplier/partner bills, disputes, and inquiries are also handled in this domain. Another important grouping used in SID is common business entities. These are business entities shared across two or more domains. As a result these busi- ness entities are not owned by any particular domain. The GB922 document of TeleManagement Forum covers the business view of SID and GB926 covers the system view of SID. 24.3 Common Information Model (CIM) The CIM is an information model developed by DMTF. It uses object-oriented constructs and design in creating information models. The hierarchical, object- oriented architecture in CIM makes it easy to depict complex interdependencies. The CIM schema provides the actual model descriptions and captures notions that are applicable to all common areas of management, independent of implementations. The CIM is a method for describing resources and their interactions in a 