A set of stream writer and reader classes and methods enable object frameworks to communicate with each other despite problems with missing classes due to mismatched versions. The stream writers are modified to deal with a new version of a class that extends from a class in an existing version by writing...http://www.google.com.au/patents/US6272521?utm_source=gb-gplus-sharePatent US6272521 - Apparatus and method for allowing object-oriented programs created with different framework versions to communicate
