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In software engineering, structural design patterns are design patterns that ease the design by identifying a simple way to realize relationships among entities.

Examples of Structural Patterns include:

• Adapter pattern: 'adapts' one interface for a class into one that a client expects

• Adapter pipeline: Use multiple adapters for debugging purposes.cite-ref-1[1]

• Retrofit Interface Pattern:cite-ref-2[2]cite-ref-3[3] An adapter used as a new interface for multiple classes at the same time.

• Aggregate pattern: a version of the Composite pattern with methods for aggregation of children

• Bridge pattern: decouple an abstraction from its implementation so that the two can vary independently

• Tombstone: An intermediate "lookup" object contains the real location of an object.cite-ref-4[4]

• Composite pattern: a tree structure of objects where every object has the same interface

• Decorator pattern: add additional functionality to an object at runtime where subclassing would result in an exponential rise of new classes

• Extensibility pattern: a.k.a. Framework - hide complex code behind a simple interface

• Facade pattern: create a simplified interface of an existing interface to ease usage for common tasks

• Flyweight pattern: a large quantity of objects share a common properties object to save space

• Marker pattern: an empty interface to associate metadata with a class.

• Pipes and filters: a chain of processes where the output of each process is the input of the next

• Opaque pointer: a pointer to an undeclared or private type, to hide implementation details

• Proxy pattern: a class functioning as an interface to another thing

• See also

• References

• Behavioral pattern

• Concurrency pattern

• Creational pattern

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cite-note-11. ↑ "Adapter Pipeline". Cunningham & Cunningham, Inc. 2010-12-31. Archived from the original on 2010-12-31. Retrieved 2012-07-20.

cite-note-22. ↑ citerefbobbywoolf2002BobbyWoolf (2002-06-19). "Retrofit Interface Pattern". Cunningham & Cunningham, Inc. Archived from the original on 2002-06-19. Retrieved 2012-07-20.

cite-note-33. ↑ citerefmartinzarate2010MartinZarate (2010-12-31). "External Polymorphism". Cunningham & Cunningham, Inc. Archived from the original on 2010-12-31. Retrieved 2012-07-20.

cite-note-44. ↑ "Tomb Stone". Cunningham & Cunningham, Inc. 2007-06-17. Archived from the original on 2007-06-17. Retrieved 2012-07-20.