Designing reusable designs (panel session): experiences designing object-oriented frameworks

An object-oriented framework is a skeleton implementation of an application or application subsystem in a particular problem domain. It is composed of concrete and abstract classes and provides a model of interaction or collaboration among the instances of classes defined by the framework. A framework is used by configuring or connecting concrete classes and deriving new concrete classes from abstract ones provided in the framework. A framework is a reusable design because all users of a framework share its basic class structure and collaboration model.