The rapid development of electronic commerce applications and information services has led to a significant need for mediation services. The brokerage of services is one particular mediation service. In this article, we present the design of service brokerage for a CORBA-based mediation platform that symmetrically supports advertising by service providers and navigation by end-users. A particular strength of this design is in the support by dynamic profile and profile rule management for both end-users and service providers. In advertising and navigation, service offer information is dynamically filtered and matched according to the profiles of endusers and service providers, such that an optimal focus of information dissemination is achieved. This is a cornerstone for dynamic provisioning of services in order to support the evolution of the marketplace. The presented design is partially based on TINA and OMG specifications.

The h i @ r a t e of prodwtlon denired in b l o a h & and slabbing mllls calls f o r a computer control m y a t e m t o calculate a paas mchedule on-line for

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