Abstract: The present invention relates generally to the field of distribution of services in communication networks and particularly to provisioning of services in a communication network with a plurality of service systems, service providers and service enablers. The system according to the invention provides a system component register (SCR) comprising service information relating to a plurality of services in the service network, said service information in stored in service data records, one for each service or group of services. Each service data records comprise at least one service instance field identifying a service instance for the specific service or group of services; and, if the specific service or group of services is a complex service or utilizes a shared resource, at least one dependency field defining dependencies for the specific service or group of services to at least one other service system in the service network.