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a) If DDD application is implemented using Onion Architecture, would Application layer reside within the Onion's Application Service layer?

b) In Onion's Object Services layer we put interfaces that provide infrastructure behavior ( such as ISendEmail or IRepository ), but what kind of behavior should interfaces in Onion's Application Service layer provide?

Thank you

bckpwrld
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    Have a look at this [SO question](http://stackoverflow.com/questions/18166740/what-are-the-typical-layers-in-an-onion-architecture), this should help you out. – MaxSC Jan 22 '14 at 17:28

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