A system and method for allowing a network application to interface with both a first transaction protocol and a second transaction protocol. The system and method provides an object-oriented base class for use by the network application. A first subclass is invoked from the base class when the network...http://www.google.com.hk/patents/US5966545?utm_source=gb-gplus-share專利 US5966545 - System for interfacing network applications with different versions of a network protocol by providing base class at session level and invoking subclass from base class at session level
