When an interpreter on a client computer encounters a symbolic reference to a remotely stored method while interpreting a locally stored method, and the object class for the remotely stored method has not previously been loaded, the client computer, the client computer creates an application ...http://www.google.de/patents/US5727147?utm_source=gb-gplus-sharePatent US5727147 - System and method for resolving symbolic references to externally located program files 
