The business-services tier is a collection of services that enforce business rules, process information, and manage transactions. The Corporate Media Library (CML) user-services tier is a client to the business objects. The business processing is handled by the business-services tier. This tier is composed of business objects, all working together to implement the functionality required for the CML application. The business objects themselves rely on the data-services tier to manage data processing by storing, retrieving, and manipulating data within the data stores.
As a three-tier application, the CML uses business logic that resides in business-services tier COM objects.