31. The system according to claim 28 , comprising a service information registry comprising a service database arranged to store said machine-readable service description or a pointer thereto supplied by the service description provider, the requesting entity being arranged to access said service description document through said registry.
31. The system according to claim 28 , comprising a service information registry comprising a service database arranged to store said machine-readable service description or a pointer thereto supplied by the service description provider, the requesting entity being arranged to access said service description document through said registry. 32. The system according to claim 31 , wherein the registry further comprises a subscription database arranged to store a subscription of the requesting entity to a service information notification service provided by said registry.