Object-Oriented application frameworks

• They are class hierarchies plus models of interactions which can be turned into complete applicatoins through various kinds of inheritance and usage associations.

• Defines a class structures as well as an interaction model for cooperating objects involved.

Design Patterns

• Guides the construction and documentation of frameworks
• Descriptions of communicating objects and classes that are customized to solve a general design problem in a particular context
• 'micro-architectures', while software architectures are more coarse-grained designs.