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-Now that we have discussed a few foundational aspects

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-of software architectures, and we have looked at some real

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-world examples that help us to illustrate some of these

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-points, to discuss some of these aspects. I want to

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-introduce and define the different elements that compose a software

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-architecture and also talk about architectural styles. So let's start

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-by discussing a software architecture's

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-elements. A software system's architecture

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-typically is not, and should not be, a uniform monolith.

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-On the contrary, an architecture should be a

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-composition and interplay of different elements. In particular,

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-as we quickly mentioned at the beginning of

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-the lesson, there are three main types of elements

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-in an architecture. Processing elements, data elements, and

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-interaction elements. Processing elements are those elements that implement

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-the business logic and perform transformations on data.

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-Data elements, also called information or state, are those

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-elements that contain the information that is used

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-and transformed by the processing elements. And finally,

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-the interaction elements are the glue that holds

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-the different pieces of the architecture together. Now,

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-the processing elements and the data are contained

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-into the system components, whereas the interaction elements

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-are maintained and controlled by the system connectors.

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-And components and connectors get all cooked together

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-into a systems configuration, which models

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-components, connectors and their relationships. So

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-now, let's look at components, connectors

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-and configurations in a little more detail.