Frameworks are a way of delivering application development patterns to support best practice sharing
during application development across diff erent companies. For example, we can have Struts Framework,
.NET Framework, Java Beans Activation Framework etc. A framework is a reusable design expressed as
a set of abstract classes and the way their instances collaborate. It is a reusable design for all or part of a
so ware system. By defi nition, a framework is an OOD. It does not have to be implemented in an OO
language, though it usually is. Large-scale reuse of OO libraries requires frameworks. e f
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