A prototype object reference for use in a distributed object computing environment is described. The object reference includes a specified object reference portion and an unspecified object reference portion. The prototype object reference is transformed into a valid object reference by insertion of...http://www.google.com.hk/patents/US6766335?utm_source=gb-gplus-share專利 US6766335 - Method and system for providing object references in a distributed object environment supporting object migration